Added a simulator based test for VM sync
CLOUDSTACK-7030. After the restart of MS in a clustered MS pool, not all hung worker VMs are recycled.
Recycle worker VMs that originally belonged to other management servers too because in case of MS restart, the owner MS might change.
CLOUDSTACK-7069. [VMware] While setting 'numCoresPerSocket' property for a Virtual Machine in VMware
 add a check to ensure the vSphere version is 5.0 or above.
CLOUDSTACK-7071. Upgrade to CCP 4.2 fails in case a VMware setup has multiple zones mapping to the same VMware datacenter.
If 2 or more CloudStack zones map to the same VMware datacenter, mark the zones as legacy zones.