Switch to oslo.service
Switch to oslo.service

oslo.service has graduated, so cinder should consume it.

Change-Id: I80487f559302b0e88953835ffb4a3bfe2a347501
Closes-Bug: #1466851
Depends-On: I305cf53bad6213c151395e93d656b53a8a28e1db
yogeshprasad/openstack,CloudByteStorages/openstack,yogeshprasad/openstack,CloudByteStorages/openstack