3PAR: Adding volume checks to manage snapshot API

3PAR: Adding volume checks to manage snapshot API

Updated the checks in the HPE 3PAR manage snapshot API to use
the volume object for comparison. Also added new checks to
prevent un/managing of snapshots from/to volumes that have a
status of 'failed-over' for replication status.

This is a follow-up patch for:
https://review.openstack.org/#/c/253760/

Implements: blueprint 3par-manage-unmanage-snapshot
Change-Id: Ie187e67d9eec2121d6ccad5667c6d9fc73f98ce3