--- fixes: - Changed the way we name host containers groups in dynamic_inventory.py for a hostname from hostname_containers to hostname-host_containers to prevent failing in the case where containers groups have the same name as host containers when choosing hostnames inspired from containers group names. This change fixes the following bugs https://bugs.launchpad.net/openstack-ansible/+bug/1512883 and https://bugs.launchpad.net/openstack-ansible/+bug/1528953.