tree afc9a07fbaaa6c1002ffd3ec1de7398e543d00fe
parent 982e5d2b95e448568484eb4b81bc85caf0fc95ab
author Elod Illes <elod.illes@est.tech> 1669128942 +0100
committer Elod Illes <elod.illes@est.tech> 1669131437 +0100

Set back to use Bionic for Ussuri, Train and Stein

With patch I2e37603b098880b778100613800496b01167b22f some jobs based on
tempest-multinode-full-py3 on stein, train and ussuri branches started
to to run on Focal, howerer those run on Bionic previously.
This patch sets back to use Bionic for those branches.

Change-Id: I9c30cf332a419946516cba776b8a3ecdb3cbd3c2