Update monasca-common to 2.1.0
Update monasca-common to 2.1.0

Change-Id: I25426e484d8e07d6176a94ae26ffa626d25d6a93
Depends-on: Ie33b4f05e6a8206d7551e1f8af929032a71a9dfc

openstack/rpm-packaging,openstack/rpm-packaging