Description of problem:
When a cluster is being added with incomplete version, the action fails with an exception rather than a proper invalid parameters message.

Version-Release number of selected component (if applicable):
ovirt-engine-sdk-java-1.0.0.11-1
ovirt-engine-3.3.0-0.3.beta1.fc19.noarch

How reproducible:
always

Steps to Reproduce:
Running the following code produces the exception below:

DataCenter dataCenter = api.getDataCenters().get("dc-1");
Cluster cluster = new Cluster();
cluster.setName("cluster");
Version version = new Version();
version.setMajor(3);
cluster.setVersion(version);
CPU cpu = new CPU();
cpu.setId("Intel Conroe Family");
cluster.setCpu(cpu);
dataCenter.getClusters().add(cluster);

Actual results:
An exception.

Expected results:
A proper invalid argument message.

Additional info:
2013-07-24 19:06:49,757 ERROR [org.apache.catalina.core.ContainerBase.[jboss.web].[default-host].[/api].[org.ovirt.engine.api.restapi.BackendApplication]] (ajp--127.0.0.1-8702-6) Servlet.se
rvice() for servlet org.ovirt.engine.api.restapi.BackendApplication threw exception: org.jboss.resteasy.spi.UnhandledException: java.lang.NullPointerException
        at org.jboss.resteasy.core.SynchronousDispatcher.handleApplicationException(SynchronousDispatcher.java:340) [resteasy-jaxrs.jar:]
        at org.jboss.resteasy.core.SynchronousDispatcher.handleException(SynchronousDispatcher.java:214) [resteasy-jaxrs.jar:]
        at org.jboss.resteasy.core.SynchronousDispatcher.handleInvokerException(SynchronousDispatcher.java:190) [resteasy-jaxrs.jar:]
        at org.jboss.resteasy.core.SynchronousDispatcher.getResponse(SynchronousDispatcher.java:540) [resteasy-jaxrs.jar:]
        at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:502) [resteasy-jaxrs.jar:]
        at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:119) [resteasy-jaxrs.jar:]
        at org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher.service(ServletContainerDispatcher.java:208) [resteasy-jaxrs.jar:]
        at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:55) [resteasy-jaxrs.jar:]
        at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:50) [resteasy-jaxrs.jar:]
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:847) [jboss-servlet-3.0-api.jar:1.0.1.Final]
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:329) [jboss-web.jar:]
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248) [jboss-web.jar:]
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:275) [jboss-web.jar:]
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:161) [jboss-web.jar:]
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:489) [jboss-web.jar:]
        at org.jboss.as.web.security.SecurityContextAssociationValve.invoke(SecurityContextAssociationValve.java:153) [jboss-as-web-7.1.1.Final.jar:7.1.1.Final]
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:155) [jboss-web.jar:]
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) [jboss-web.jar:]
        at org.jboss.web.rewrite.RewriteValve.invoke(RewriteValve.java:466) [jboss-web.jar:]
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) [jboss-web.jar:]
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:368) [jboss-web.jar:]
        at org.apache.coyote.ajp.AjpProcessor.process(AjpProcessor.java:505) [jboss-web.jar:]
        at org.apache.coyote.ajp.AjpProtocol$AjpConnectionHandler.process(AjpProtocol.java:445) [jboss-web.jar:]
        at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:930) [jboss-web.jar:]
        at java.lang.Thread.run(Thread.java:724) [rt.jar:1.7.0_25]
Caused by: java.lang.NullPointerException
        at org.ovirt.engine.core.common.action.VdsGroupOperationParameters.<init>(VdsGroupOperationParameters.java:13) [common.jar:]
        at org.ovirt.engine.api.restapi.resource.BackendDataCenterClustersResource.add(BackendDataCenterClustersResource.java:54) [restapi-jaxrs.jar:]
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [rt.jar:1.7.0_25]
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) [rt.jar:1.7.0_25]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) [rt.jar:1.7.0_25]
        at java.lang.reflect.Method.invoke(Method.java:606) [rt.jar:1.7.0_25]
        at org.jboss.resteasy.core.MethodInjectorImpl.invoke(MethodInjectorImpl.java:155) [resteasy-jaxrs.jar:]
        at org.jboss.resteasy.core.ResourceMethod.invokeOnTarget(ResourceMethod.java:257) [resteasy-jaxrs.jar:]
        at org.jboss.resteasy.core.ResourceMethod.invoke(ResourceMethod.java:222) [resteasy-jaxrs.jar:]
        at org.jboss.resteasy.core.ResourceLocator.invokeOnTargetObject(ResourceLocator.java:152) [resteasy-jaxrs.jar:]