Fix comment
Fix comment

Change-Id: Ie34c67b8f041536a2d8cbaa8490a08ef479f00ee

openstack/monasca-persister,stackforge/monasca-persister,stackforge/monasca-persister,openstack/monasca-persister,stackforge/monasca-persister,openstack/monasca-persister,sapcc/monasca-persister