Description of problem:
The engine is raising a NPE trying to build the OVF_STORE content.

2019-03-16 22:38:41,827-04 INFO  [org.ovirt.engine.core.bll.storage.ovfstore.OvfDataUpdater] (EE-ManagedThreadFactory-engineScheduled-Thread-1) [] Attempting to update VMs/Templates Ovf.
2019-03-16 22:38:41,831-04 INFO  [org.ovirt.engine.core.bll.storage.ovfstore.ProcessOvfUpdateForStoragePoolCommand] (EE-ManagedThreadFactory-engineScheduled-Thread-1) [5c41ec26] Before acquiring and wait lock 'EngineLock:{exclusiveLocks='[c1f47590-485b-11e9-8f3b-5452c0a8c863=OVF_UPDATE]', sharedLocks=''}'
2019-03-16 22:38:41,831-04 INFO  [org.ovirt.engine.core.bll.storage.ovfstore.ProcessOvfUpdateForStoragePoolCommand] (EE-ManagedThreadFactory-engineScheduled-Thread-1) [5c41ec26] Lock-wait acquired to object 'EngineLock:{exclusiveLocks='[c1f47590-485b-11e9-8f3b-5452c0a8c863=OVF_UPDATE]', sharedLocks=''}'
2019-03-16 22:38:41,833-04 INFO  [org.ovirt.engine.core.bll.storage.ovfstore.ProcessOvfUpdateForStoragePoolCommand] (EE-ManagedThreadFactory-engineScheduled-Thread-1) [5c41ec26] Running command: ProcessOvfUpdateForStoragePoolCommand internal: true. Entities affected :  ID: c1f47590-485b-11e9-8f3b-5452c0a8c863 Type: StoragePool
2019-03-16 22:38:41,845-04 INFO  [org.ovirt.engine.core.bll.storage.ovfstore.ProcessOvfUpdateForStoragePoolCommand] (EE-ManagedThreadFactory-engineScheduled-Thread-1) [5c41ec26] Attempting to update VM OVFs in Data Center 'Default'
2019-03-16 22:38:41,930-04 WARN  [org.ovirt.engine.core.vdsbroker.builder.vminfo.VmInfoBuildUtils] (EE-ManagedThreadFactory-engineScheduled-Thread-1) [5c41ec26] No host NUMA nodes found for vm HostedEngine (9d1ed4dd-b7a0-48f9-b3cc-1bc959e5193c)
2019-03-16 22:38:41,934-04 ERROR [org.ovirt.engine.core.bll.storage.ovfstore.ProcessOvfUpdateForStoragePoolCommand] (EE-ManagedThreadFactory-engineScheduled-Thread-1) [5c41ec26] Command 'org.ovirt.engine.core.bll.storage.ovfstore.ProcessOvfUpdateForStoragePoolCommand' failed: null
2019-03-16 22:38:41,934-04 ERROR [org.ovirt.engine.core.bll.storage.ovfstore.ProcessOvfUpdateForStoragePoolCommand] (EE-ManagedThreadFactory-engineScheduled-Thread-1) [5c41ec26] Exception: java.lang.NullPointerException
	at org.ovirt.engine.core.vdsbroker.builder.vminfo.LibvirtVmXmlBuilder.writeGraphics(LibvirtVmXmlBuilder.java:1625) [vdsbroker.jar:]
	at org.ovirt.engine.core.vdsbroker.builder.vminfo.LibvirtVmXmlBuilder.writeDevices(LibvirtVmXmlBuilder.java:1006) [vdsbroker.jar:]
	at org.ovirt.engine.core.vdsbroker.builder.vminfo.LibvirtVmXmlBuilder.buildCreateVm(LibvirtVmXmlBuilder.java:262) [vdsbroker.jar:]
	at org.ovirt.engine.core.utils.ovf.OvfManager.generateEngineXml(OvfManager.java:221) [bll.jar:]
	at org.ovirt.engine.core.utils.ovf.OvfManager.exportVm(OvfManager.java:70) [bll.jar:]
	at org.ovirt.engine.core.bll.storage.ovfstore.OvfUpdateProcessHelper.generateVmMetadata(OvfUpdateProcessHelper.java:155) [bll.jar:]
	at org.ovirt.engine.core.bll.storage.ovfstore.OvfUpdateProcessHelper.buildMetadataDictionaryForVm(OvfUpdateProcessHelper.java:80) [bll.jar:]
	at org.ovirt.engine.core.bll.storage.ovfstore.ProcessOvfUpdateForStoragePoolCommand.populateVmsMetadataForOvfUpdate(ProcessOvfUpdateForStoragePoolCommand.java:364) [bll.jar:]
	at org.ovirt.engine.core.bll.storage.ovfstore.ProcessOvfUpdateForStoragePoolCommand.updateOvfForVmsOfStoragePool(ProcessOvfUpdateForStoragePoolCommand.java:187) [bll.jar:]
	at org.ovirt.engine.core.bll.storage.ovfstore.ProcessOvfUpdateForStoragePoolCommand.executeCommand(ProcessOvfUpdateForStoragePoolCommand.java:121) [bll.jar:]
	at org.ovirt.engine.core.bll.CommandBase.executeWithoutTransaction(CommandBase.java:1157) [bll.jar:]
	at org.ovirt.engine.core.bll.CommandBase.executeActionInTransactionScope(CommandBase.java:1315) [bll.jar:]
	at org.ovirt.engine.core.bll.CommandBase.runInTransaction(CommandBase.java:1964) [bll.jar:]
	at org.ovirt.engine.core.utils.transaction.TransactionSupport.executeInSuppressed(TransactionSupport.java:164) [utils.jar:]
	at org.ovirt.engine.core.utils.transaction.TransactionSupport.executeInScope(TransactionSupport.java:103) [utils.jar:]
	at org.ovirt.engine.core.bll.CommandBase.execute(CommandBase.java:1375) [bll.jar:]
	at org.ovirt.engine.core.bll.CommandBase.executeAction(CommandBase.java:419) [bll.jar:]
	at org.ovirt.engine.core.bll.executor.DefaultBackendActionExecutor.execute(DefaultBackendActionExecutor.java:13) [bll.jar:]
	at org.ovirt.engine.core.bll.Backend.runAction(Backend.java:450) [bll.jar:]
	at org.ovirt.engine.core.bll.Backend.runActionImpl(Backend.java:432) [bll.jar:]
	at org.ovirt.engine.core.bll.Backend.runInternalAction(Backend.java:377) [bll.jar:]
	at sun.reflect.GeneratedMethodAccessor519.invoke(Unknown Source) [:1.8.0_201]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) [rt.jar:1.8.0_201]
	at java.lang.reflect.Method.invoke(Method.java:498) [rt.jar:1.8.0_201]
	at org.jboss.as.ee.component.ManagedReferenceMethodInterceptor.processInvocation(ManagedReferenceMethodInterceptor.java:52)
	at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:422)
	at org.jboss.invocation.InterceptorContext$Invocation.proceed(InterceptorContext.java:509)
	at org.jboss.as.weld.interceptors.Jsr299BindingsInterceptor.delegateInterception(Jsr299BindingsInterceptor.java:79)
	at org.jboss.as.weld.interceptors.Jsr299BindingsInterceptor.doMethodInterception(Jsr299BindingsInterceptor.java:89)
	at org.jboss.as.weld.interceptors.Jsr299BindingsInterceptor.processInvocation(Jsr299BindingsInterceptor.java:102)
	at org.jboss.as.ee.component.interceptors.UserInterceptorFactory$1.processInvocation(UserInterceptorFactory.java:63)
	at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:422)
	at org.jboss.as.ejb3.component.invocationmetrics.ExecutionTimeInterceptor.processInvocation(ExecutionTimeInterceptor.java:43) [wildfly-ejb3-15.0.1.Final.jar:15.0.1.Final]
	at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:422)
	at org.jboss.as.ee.concurrent.ConcurrentContextInterceptor.processInvocation(ConcurrentContextInterceptor.java:45) [wildfly-ee-15.0.1.Final.jar:15.0.1.Final]
	at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:422)
	at org.jboss.invocation.InitialInterceptor.processInvocation(InitialInterceptor.java:40)
	at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:422)
	at org.jboss.invocation.ChainedInterceptor.processInvocation(ChainedInterceptor.java:53)
	at org.jboss.as.ee.component.interceptors.ComponentDispatcherInterceptor.processInvocation(ComponentDispatcherInterceptor.java:52)
	at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:422)
	at org.jboss.as.ejb3.component.singleton.SingletonComponentInstanceAssociationInterceptor.processInvocation(SingletonComponentInstanceAssociationInterceptor.java:53) [wildfly-ejb3-15.0.1.Final.jar:15.0.1.Final]
	at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:422)
	at org.jboss.as.ejb3.tx.CMTTxInterceptor.invokeInNoTx(CMTTxInterceptor.java:216) [wildfly-ejb3-15.0.1.Final.jar:15.0.1.Final]
	at org.jboss.as.ejb3.tx.CMTTxInterceptor.supports(CMTTxInterceptor.java:418) [wildfly-ejb3-15.0.1.Final.jar:15.0.1.Final]
	at org.jboss.as.ejb3.tx.CMTTxInterceptor.processInvocation(CMTTxInterceptor.java:148) [wildfly-ejb3-15.0.1.Final.jar:15.0.1.Final]
	at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:422)
	at org.jboss.invocation.InterceptorContext$Invocation.proceed(InterceptorContext.java:509)
	at org.jboss.weld.module.ejb.AbstractEJBRequestScopeActivationInterceptor.aroundInvoke(AbstractEJBRequestScopeActivationInterceptor.java:81) [weld-ejb-3.0.5.Final.jar:3.0.5.Final]
	at org.jboss.as.weld.ejb.EjbRequestScopeActivationInterceptor.processInvocation(EjbRequestScopeActivationInterceptor.java:89)
	at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:422)
	at org.jboss.as.ejb3.component.interceptors.CurrentInvocationContextInterceptor.processInvocation(CurrentInvocationContextInterceptor.java:41) [wildfly-ejb3-15.0.1.Final.jar:15.0.1.Final]
	at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:422)
	at org.jboss.as.ejb3.component.invocationmetrics.WaitTimeInterceptor.processInvocation(WaitTimeInterceptor.java:47) [wildfly-ejb3-15.0.1.Final.jar:15.0.1.Final]
	at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:422)
	at org.jboss.as.ejb3.security.SecurityContextInterceptor.processInvocation(SecurityContextInterceptor.java:100) [wildfly-ejb3-15.0.1.Final.jar:15.0.1.Final]
	at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:422)
	at org.jboss.as.ejb3.deployment.processors.StartupAwaitInterceptor.processInvocation(StartupAwaitInterceptor.java:22) [wildfly-ejb3-15.0.1.Final.jar:15.0.1.Final]
	at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:422)
	at org.jboss.as.ejb3.component.interceptors.ShutDownInterceptorFactory$1.processInvocation(ShutDownInterceptorFactory.java:64) [wildfly-ejb3-15.0.1.Final.jar:15.0.1.Final]
	at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:422)
	at org.jboss.as.ejb3.component.interceptors.LoggingInterceptor.processInvocation(LoggingInterceptor.java:67) [wildfly-ejb3-15.0.1.Final.jar:15.0.1.Final]
	at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:422)
	at org.jboss.as.ee.component.NamespaceContextInterceptor.processInvocation(NamespaceContextInterceptor.java:50)
	at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:422)
	at org.jboss.invocation.ContextClassLoaderInterceptor.processInvocation(ContextClassLoaderInterceptor.java:60)
	at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:422)
	at org.jboss.invocation.InterceptorContext.run(InterceptorContext.java:438)
	at org.wildfly.security.manager.WildFlySecurityManager.doChecked(WildFlySecurityManager.java:618)
	at org.jboss.invocation.AccessCheckingInterceptor.processInvocation(AccessCheckingInterceptor.java:57)
	at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:422)
	at org.jboss.invocation.ChainedInterceptor.processInvocation(ChainedInterceptor.java:53)
	at org.jboss.as.ee.component.ViewService$View.invoke(ViewService.java:198)
	at org.jboss.as.ee.component.ViewDescription$1.processInvocation(ViewDescription.java:185)
	at org.jboss.as.ee.component.ProxyInvocationHandler.invoke(ProxyInvocationHandler.java:81)
	at org.ovirt.engine.core.bll.interfaces.BackendInternal$$$view2.runInternalAction(Unknown Source) [bll.jar:]
	at sun.reflect.GeneratedMethodAccessor518.invoke(Unknown Source) [:1.8.0_201]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) [rt.jar:1.8.0_201]
	at java.lang.reflect.Method.invoke(Method.java:498) [rt.jar:1.8.0_201]
	at org.jboss.weld.util.reflection.Reflections.invokeAndUnwrap(Reflections.java:410) [weld-core-impl-3.0.5.Final.jar:3.0.5.Final]
	at org.jboss.weld.module.ejb.EnterpriseBeanProxyMethodHandler.invoke(EnterpriseBeanProxyMethodHandler.java:134) [weld-ejb-3.0.5.Final.jar:3.0.5.Final]
	at org.jboss.weld.bean.proxy.EnterpriseTargetBeanInstance.invoke(EnterpriseTargetBeanInstance.java:56) [weld-core-impl-3.0.5.Final.jar:3.0.5.Final]
	at org.jboss.weld.module.ejb.InjectionPointPropagatingEnterpriseTargetBeanInstance.invoke(InjectionPointPropagatingEnterpriseTargetBeanInstance.java:68) [weld-ejb-3.0.5.Final.jar:3.0.5.Final]
	at org.jboss.weld.bean.proxy.ProxyMethodHandler.invoke(ProxyMethodHandler.java:106) [weld-core-impl-3.0.5.Final.jar:3.0.5.Final]
	at org.ovirt.engine.core.bll.BackendCommandObjectsHandler$BackendInternal$BackendLocal$2049259618$Proxy$_$$_Weld$EnterpriseProxy$.runInternalAction(Unknown Source) [bll.jar:]
	at org.ovirt.engine.core.bll.storage.ovfstore.OvfDataUpdater.performOvfUpdateForStoragePool(OvfDataUpdater.java:65) [bll.jar:]
	at org.ovirt.engine.core.bll.storage.ovfstore.OvfDataUpdater.updateOvfData(OvfDataUpdater.java:85) [bll.jar:]
	at org.ovirt.engine.core.bll.storage.ovfstore.OvfDataUpdater.ovfUpdate(OvfDataUpdater.java:72) [bll.jar:]
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [rt.jar:1.8.0_201]
	at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308) [rt.jar:1.8.0_201]
	at org.glassfish.enterprise.concurrent.internal.ManagedScheduledThreadPoolExecutor$ManagedScheduledFutureTask.access$201(ManagedScheduledThreadPoolExecutor.java:383) [javax.enterprise.concurrent-1.0.jar:]
	at org.glassfish.enterprise.concurrent.internal.ManagedScheduledThreadPoolExecutor$ManagedScheduledFutureTask.run(ManagedScheduledThreadPoolExecutor.java:534) [javax.enterprise.concurrent-1.0.jar:]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [rt.jar:1.8.0_201]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [rt.jar:1.8.0_201]
	at java.lang.Thread.run(Thread.java:748) [rt.jar:1.8.0_201]
	at org.glassfish.enterprise.concurrent.ManagedThreadFactoryImpl$ManagedThread.run(ManagedThreadFactoryImpl.java:250) [javax.enterprise.concurrent-1.0.jar:]
	at org.jboss.as.ee.concurrent.service.ElytronManagedThreadFactory$ElytronManagedThread.run(ElytronManagedThreadFactory.java:78)

2019-03-16 22:38:41,942-04 INFO  [org.ovirt.engine.core.bll.storage.ovfstore.ProcessOvfUpdateForStoragePoolCommand] (EE-ManagedThreadFactory-engineScheduled-Thread-1) [5c41ec26] Lock freed to object 'EngineLock:{exclusiveLocks='[c1f47590-485b-11e9-8f3b-5452c0a8c863=OVF_UPDATE]', sharedLocks=''}'
2019-03-16 22:38:41,942-04 ERROR [org.ovirt.engine.core.bll.storage.ovfstore.OvfDataUpdater] (EE-ManagedThreadFactory-engineScheduled-Thread-1) [5c41ec26] Exception while trying to update or remove VMs/Templates ovf in Data Center 'Default'.
2019-03-16 22:38:41,942-04 ERROR [org.ovirt.engine.core.bll.storage.ovfstore.OvfDataUpdater] (EE-ManagedThreadFactory-engineScheduled-Thread-1) [5c41ec26] Data Center '{}' domains list for OVF update returned as NULL


Version-Release number of selected component (if applicable):
4.3

How reproducible:
100% in OST, see:
https://jenkins.ovirt.org/job/ovirt-system-tests_he-basic-suite-master/1149/artifact/exported-artifacts/test_logs/he-basic-suite-master/post-suite-sigterm/lago-he-basic-suite-master-host-0/_var_log/ovirt-hosted-engine-setup/engine-logs-2019-03-17T02%3A39%3A11Z/ovirt-engine/engine.log

Steps to Reproduce:
1. deploy hosted-engine
2.
3.

Actual results:
2019-03-16 22:38:41,934-04 ERROR [org.ovirt.engine.core.bll.storage.ovfstore.ProcessOvfUpdateForStoragePoolCommand] (EE-ManagedThreadFactory-engineScheduled-Thread-1) [5c41ec26] Command 'org.ovirt.engine.core.bll.storage.ovfstore.ProcessOvfUpdateForStoragePoolCommand' failed: null
2019-03-16 22:38:41,934-04 ERROR [org.ovirt.engine.core.bll.storage.ovfstore.ProcessOvfUpdateForStoragePoolCommand] (EE-ManagedThreadFactory-engineScheduled-Thread-1) [5c41ec26] Exception: java.lang.NullPointerException
	at org.ovirt.engine.core.vdsbroker.builder.vminfo.LibvirtVmXmlBuilder.writeGraphics(LibvirtVmXmlBuilder.java:1625) [vdsbroker.jar:]

Expected results:
the engine successfully creates the OVF_STORE content

Additional info:
It breaks hosted-engine deployment