This change removes the attributes we'll be moving to openstack-common and changes reference of those attributes to reflect new (more consistent) namespace. We also fix a broken test which doesn't properly converge after changing a node attribute. Lastly, we handle the rabbit mq attribute use_ssl. Change-Id: I12b9c33f89eb35a66bae7420340aff10efd18b1c Implements: blueprint clean-up-attr-for-mq-and-db