Required to keep running jobs when branches are renamed from stable to unmaintained. Also drop references for TripleO projects as dropped from zuul config[1]. [1] https://review.opendev.org/c/openstack/project-config/+/910270 Related-Bug: #2056276 Change-Id: Ie5a92efa3a9b8dbdd9f2783380ce0c13ca264258