* Option to deploy a VM with existing volume/snapshot
* smoke test changes
check if the hypervisor is KVM
check if the primary storage's scope is ZONE wide
* skip all tests if the storage isn't Zone-Wide and the hypervisor isn't KVM
* support StorPool tags
add StorPool tags to a volume created from snapshot or to a volume which
will be attached as a ROOT to a new VM
* Add StorPool tags on the new ROOT volume
* Add the StorPool's tags when volume is created from a snapshot or a
volume is attached as a ROOT to a VM
* Addressed review
