Pull RDO Trunk repos when CentOS Stream official RPM not available

The RDO project releases centos-release-openstack-* RPM a couple of
weeks after the OpenStack upstream project cut master branch.
In order to fill the gap in the meantime, we have to pull the repos
from RDO Trunk.

Change-Id: If95a687f2d7579779129eeb689cfa46b92450dc5
1 file changed