Description of problem:

If a maximum memory is configured >= 2048 GB, then a negative value is generated for the maxMemory.

===
2018-10-10 14:48:51,242-04 INFO  [org.ovirt.engine.core.vdsbroker.vdsbroker.CreateBrokerVDSCommand] (EE-ManagedThreadFactory-engine-Thread-80) [d870c8c6-95c2-4690-81b0-2c7786d89a3a] VM <?xml version="1.0" encoding="UTF-8"?><domain type="kvm" xmlns:ovirt-tune="http://ovirt.org/vm/tune/1.0" xmlns:ovirt-vm="http://ovirt.org/vm/1.0">
  <name>RHEL_7.4</name>
  <uuid>6c4da374-ed44-4407-943b-192d6b7ed540</uuid>
  <memory>1572864</memory>
  <currentMemory>1572864</currentMemory>
  <iothreads>1</iothreads>
  <maxMemory slots="16">-2147483648</maxMemory>       => negative value
===

Because of this, VM will fail to start with the error below.

2018-10-10 14:48:53,834-04 ERROR [org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector] (ForkJoinPool-1-worker-6) [] EVENT_ID: VM_DOWN_ERROR(119), VM RHEL_7.4 is down with error. Exit message: XML error: Invalid value '-2147483648' for element or attribute './maxMemory[1]'.


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

ovirt-engine-4.2.6.4-0.1.el7ev.noarch

How reproducible:

100%

Steps to Reproduce:

1. Create a VM with Maximum memory >= 2048 GB and start it.


Actual results:

VM fails to start with error "XML error: Invalid value '-2147483648' for element or attribute './maxMemory[1]"

Expected results:

VM should start.

Additional info: