Comment 2 for bug 1938227

Reviewed: https://review.opendev.org/c/openstack/tempest/+/802625
Committed: https://opendev.org/openstack/tempest/commit/617c84c7e5f040c1cdbff7bc63be7e74281c2b3c
Submitter: "Zuul (22348)"
Branch: master

commit 617c84c7e5f040c1cdbff7bc63be7e74281c2b3c
Author: Ghanshyam Mann <email address hidden>
Date: Tue Jul 27 16:24:53 2021 -0500

    Fix run-tempest-26 role for stable/stein

    stable/stein uses old Tempest 26.0.0 to run the test
    and that is why we use stable/stein upper-constraints
    in the testing. But when any jobs with tempest plugins
    try to run plugins tests, they fail.

    This is because a new role run-tempest-26 (used for testing
    with tempest 26.0.0) does not include the stable/stein in the
    list of branches for whom we use stable constraints instead of
    master constraints. and due to that run-tempest-26 finds constraints
    mismatch and recreates the tempest virtual env. On recreation, venv
    remove the previously installed tempest pluings and so does not run
    their test.

    Closes-Bug: #1938227
    Change-Id: I00ac642fa602980d14612adc1ce65068d67db8ad