
Implements support for managing and unmanaging snapshots to the HPE LeftHand driver. This patch now allows snapshots to be removed from OpenStack management but still left on the LeftHand backend. Snapshots on the LeftHand backend can also be managed by OpenStack. DocImpact Implements: blueprint lefthand-manage-unmanage-snapshot Change-Id: Ic0048fd5da437cf8caddc166cf60ec035def39aa