Pin python-tempestconf in Ussuri
Pin python-tempestconf in Ussuri

python-tempestconf project is about to drop Ussuri jobs validating
new changes [1], therefore the project will not be able to guarantee
compatibility of the new changes with Ussuri release.

This patch pinns python-tempestconf's version for Ussuri release to
the latest one - 3.3.0 released in March 2022.

[1] https://review.opendev.org/c/openinfra/python-tempestconf/+/853517

Change-Id: I6498ce12805f0928a9afa4689b1f6901873afaa2

redhat-openstack/rdoinfo