Provide synchronization during the Vopt creation
Provide synchronization during the Vopt creation

During concurrent scale deploys sometime we hit the synchronization
issue during the vopt validation.

Change-Id: Ic522b8a1cfc984e114ec74e827ae1546236a7c55
Closes-bug: #1521097

stackforge/nova-powervm,openstack/nova-powervm,openstack/nova-powervm,stackforge/nova-powervm