Add Tooz locks to support A/A HA spec
Add Tooz locks to support A/A HA spec

This spec proposes an approach to wrap local file locks in c-vol's
manager and drivers with Tooz abstraction layer to have a possiblity
of making them distributed.

Implements: blueprint cinder-volume-active-active-support
Change-Id: I69b2da52c4b39c81fccc162890f98834f56d7ef6

openstack/cinder-specs