Bump pytest-xdist from 2.1.0 to 2.2.0 (#347)

Bumps [pytest-xdist](https://github.com/pytest-dev/pytest-xdist) from 2.1.0 to 2.2.0.
- [Release notes](https://github.com/pytest-dev/pytest-xdist/releases)
- [Changelog](https://github.com/pytest-dev/pytest-xdist/blob/master/CHANGELOG.rst)
- [Commits](pytest-dev/pytest-xdist@v2.1.0...v2.2.0)

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

requirements.txt

@@ -21,4 +21,4 @@ tabulate==0.8.7
 paramiko==2.7.2
 openshift-client==1.0.12
 Jinja2===2.11.2
-pytest-xdist==2.1.0
+pytest-xdist==2.2.0