Fix container image publish to Docker Hub
Fix container image publish to Docker Hub

Publishing container images to Docker Hub was failing with:

    state is present but all of the following are missing: source

This is caused by the recent Ansible upgrade by Zuul [1]: the source
parameter is mandatory since Ansible 2.12.

[1] https://review.opendev.org/c/openstack/project-config/+/849120

Change-Id: I232fe835f5a650c258243f1ee4720480f2e6e7b1

openstack/kolla,openstack/kolla