Improve coverage
Improve coverage

Change-Id: I556791fc240e6f5fb8e0b5ddf9238294835a5015
Story: 2003881
Task: 29453

stackforge/monasca-common,openstack/monasca-common,stackforge/monasca-common,stackforge/monasca-common,openstack/monasca-common,openstack/monasca-common