Updated openstack/openstack
Project: openstack/cinder  1d1a9b3fe7bc4acd19c68b58791f34389148bb9d
null
ceph backup driver: improve log messages

Added additional information to log messages where helpful and tidied
code.

Change-Id: Ie7c54ab970223c6993254069d5d419e1ee90bedb
Closes-Bug: #1279703