tree ec88dd2011e9a93acffa3b79e15e944eec7ce012
parent ba43685c131d6387779ed35f5bf61fc86667a728
author Ghanshyam Mann <gmann@ghanshyammann.com> 1654041304 -0500
committer Ghanshyam Mann <gmann@ghanshyammann.com> 1654041304 -0500

Update stable branches jobs on master gate

we have stable/xena and stable/yoga also present
and supported so we should add their job on master
gate to keep branchless tempest plugins compatible
to stable branch.

This also removes the old EM stable branches which are
train, ussuri, and victoria jobs.

Ref: Tempest plugins guide for stable branch testing:
- https://docs.openstack.org/tempest/latest/stable_branch_testing_policy.html

Change-Id: I56aaabe6d4a228dfc9434e9d0c163251ff64c279