f2c54e6121
Ceph was default backup driver in ceph.
Before this change [0] ceph backup was enabled
when ceph was enabled, but now uses
cinder_backup_driver which defaults to NFS.
This will cause users upgrading from ocata
loose their backup functionallity.
[0] a7c47a0539
Change-Id: I44ef59291c90289abfb8c05726540893ae029d23