Rename devstack-plugin-ceph jobs
Rename devstack-plugin-ceph jobs

These jobs are in-repo now and renamed, follow renamed.

Change-Id: I7441efa0e2814e2851409e6ad670f1c7d3f95622
Depends-On: https://review.openstack.org/543048

mahak/cinder,openstack/cinder,mahak/cinder,openstack/cinder