This adds a minimal requirement sceleton to enable os_freezer deployment and testing with AIO. Depends-On: https://review.opendev.org/c/openstack/openstack-ansible-os_horizon/+/975513 Depends-On: https://review.opendev.org/c/openstack/openstack-ansible-os_tempest/+/981239 Needed-By: https://review.opendev.org/c/openstack/openstack-ansible-os_freezer/+/975794 Needed-By: https://review.opendev.org/c/openstack/openstack-ansible-plugins/+/975793 Change-Id: I9f2ee74979466fff3c09b5dc4179f4a51162529d Signed-off-by: Dmitriy Rabotyagov <dmitriy.rabotyagov@cleura.com>