Make cleanup-containers works dynamically. The script
removes the containers and its volumes dynamically based
on label contained in each kolla container, this way is not
needed create a big container and volume lists to be deleted.
http://paste.openstack.org/show/496357/
Closes-Bug: #1579044
Change-Id: Ie0d8a38ba2cf77c8d5da655958407145f4105bec