[SSSD] [sssd PR#693][comment] SYSDB: Fall back to the MPG result of getgrgid search if the non-MPG search for override doesn't match anything

[jhrozek]

URL: https://github.com/SSSD/sssd/pull/693
Title: #693: SYSDB: Fall back to the MPG result of getgrgid search if the non-MPG search for override doesn't match anything

jhrozek commented:
"""
Rebased per @pbrezina 's request
"""

See the full comment at https://github.com/SSSD/sssd/pull/693#issuecomment-528059811