[CI] Fix broken docker registry

This patch fixes CI broken by the following patches:
- https://review.opendev.org/c/openstack/kolla-ansible/+/689870
- https://review.opendev.org/c/openstack/kolla-ansible/+/751795



Co-Authored-By: Vladislav Belogrudov <vladislav.belogrudov@dell.com>
Change-Id: If26a9f9791ce9b7817bcd410ea045d3e3b04b651