[SSSD] [sssd PR#933][comment] Unify the indentation to 4 spaces

[pbrezina]

  URL: https://github.com/SSSD/sssd/pull/933
Title: #933: Unify the indentation to 4 spaces

pbrezina commented:
"""
I'm fine with fixing the indentation, I just wonder if git can cope with different
backspaces when backporting patches?
"""

See the full comment at https://github.com/SSSD/sssd/pull/933#issuecomment-553473689