Updated openstack/openstack
Project: openstack/cinder  04fd150ae5d06ab59e5efadb901156eed297c8b7

Scality SOFS: implement volume backup and restore

Add support in Scality SOFS driver for volume backup interface
to backup or restore a volume using backup service
specified in cinder.conf.

Change-Id: I6b4b132c7aec9d0e9e558fd30036cf95d80698d1