[freeipa PR#4538][opened] Bump required Pytest

[stanislavlevin]

   URL: https://github.com/freeipa/freeipa/pull/4538
Author: stanislavlevin
 Title: #4538: Bump required Pytest
Action: opened

PR body:
"""
This bumps required Pytest to 3.9.1+ and adds cleanups:
- removed deprecated yield_fixture
- removed no longer needed 'get_marker'
- removed no longer needed 'capture' compatibility
- removed no longer needed 'skip' compatibility
- fixed PytestDeprecationWarning about 'junit_family'
- pinned the `ipa-run-tests` shell implementation to bash

Fixes: https://pagure.io/freeipa/issue/8101
"""

To pull the PR as Git branch:
git remote add ghfreeipa https://github.com/freeipa/freeipa
git fetch ghfreeipa pull/4538/head:pr4538
git checkout pr4538