Comment 0 for bug 1808371

After fixing container prep for standalone jobs, we discover that if we have the 'tag_from_label' atribute with at the containers-prepare-parameters.yaml the tripleo-image-modify role is not executed.

Possible failure is here https://github.com/openstack/tripleo-common/blob/master/tripleo_common/image/kolla_builder.py#L298-L306