Title: #705: KCM: Add configurable quotas
The tests were not cleaning after one another. I guess that's why I didn't see the
failed results on my machine when running the tests one-by-one. So far I added a
standalone fixup commit for easier review, if you think the patchset is not OK, I will
squash the latest patch into the one that adds the tests.
See the full comment at https://github.com/SSSD/sssd/pull/705#issuecomment-460960832