[SSSD] [sssd PR#796][comment] ci: enable sssd-ci for 1-16 branch

[jhrozek]

URL: https://github.com/SSSD/sssd/pull/796
Title: #796: ci: enable sssd-ci for 1-16 branch

jhrozek commented:
"""
I'm sorry I dropped PR reviews lately. I think it would be nice to add also the modern distributions. As upstream, we should make sure our stable branch runs even on more modern systems.
"""

See the full comment at https://github.com/SSSD/sssd/pull/796#issuecomment-488079316