gate: work with old and new devstack ceph plugin
gate: work with old and new devstack ceph plugin

Change-Id: Ie27a2d9a77f632f027773f84fe23af5c11252aa7

leandroreox/gnocchi,sileht/gnocchi,gnocchixyz/gnocchi,gnocchixyz/gnocchi,sileht/gnocchi,leandroreox/gnocchi