live-migration provision fix
live-migration provision fix

Closes-Bug: #1463170
Issue: When provisioning external NFS based live-migration, the
    provision script still checks for the Live migration VM image
    that is used for ceph based provision for image transfer.
Fix: Check added to ignore the VM image transfer in case of Non-nfs
    based live-migration or external NFS based live-migration.

Change-Id: I08a199337177674350a8aede1e6308d46b188452

Juniper/contrail-fabric-utils,Juniper/contrail-fabric-utils