CLOUDSTACK-4265 [VMWARE] clustered Management server Unable to perform VM live migration among vmware clusters

This is due to a VM on zone wide primary storage not requiring storage migration while migrating across clster.
Detecting the storage pool type before allowing normal migration (without storage live migration) of VM across cluster.

Signed-off-by: Sateesh Chodapuneedi <sateesh@apache.org>