[SSSD] [sssd PR#5922][comment] test: fix pep8 complaint

[ikerexxe]

URL: https://github.com/SSSD/sssd/pull/5922
Title: #5922: test: fix pep8 complaint

ikerexxe commented:
"""
@sidecontrol can you review this PR? It solves our current problems with the python code style tool and I don't know if you already solved them.
"""

See the full comment at https://github.com/SSSD/sssd/pull/5922#issuecomment-995553373