[sssd PR#5892][comment] Tests: Add a test for BZ2004406

[ikerexxe]

URL: https://github.com/SSSD/sssd/pull/5892
Title: #5892: Tests: Add a test for BZ2004406

ikerexxe commented:
"""
Please rebase on top of current master branch so that pep8 tests pass on debian10 and RHEL8. This way the CI tool should be able to execute the complete pipeline.
"""

See the full comment at https://github.com/SSSD/sssd/pull/5892#issuecomment-995968508