Provide error messages on CRUD actions
Provide error messages on CRUD actions

Change-Id: I6b1adddd5cb53d82b34dbe153d9bec70be40c073

ionrock/designate,ramsateesh/designate,muraliselva10/designate,tonyli71/designate,muraliselva10/designate,openstack/designate,ramsateesh/designate,cneill/designate-testing,openstack/designate,muraliselva10/designate,openstack/designate,grahamhayes/designate,grahamhayes/designate,ionrock/designate,tonyli71/designate,ionrock/designate,ramsateesh/designate,cneill/designate-testing,cneill/designate-testing,tonyli71/designate,grahamhayes/designate