Merge "CentOS 8: Support variable image tag suffix"

ansible/group_vars/all.yml

ansible/roles/aodh/defaults/main.yml

ansible/roles/barbican/defaults/main.yml

ansible/roles/bifrost/defaults/main.yml

ansible/roles/blazar/defaults/main.yml

ansible/roles/ceilometer/defaults/main.yml

ansible/roles/ceph/defaults/main.yml

ansible/roles/chrony/defaults/main.yml

ansible/roles/cinder/defaults/main.yml

ansible/roles/cloudkitty/defaults/main.yml

ansible/roles/collectd/defaults/main.yml

ansible/roles/common/defaults/main.yml

ansible/roles/congress/defaults/main.yml

ansible/roles/cyborg/defaults/main.yml

ansible/roles/designate/defaults/main.yml

ansible/roles/elasticsearch/defaults/main.yml

ansible/roles/etcd/defaults/main.yml

ansible/roles/freezer/defaults/main.yml

ansible/roles/glance/defaults/main.yml

ansible/roles/gnocchi/defaults/main.yml