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

[centos-ci]

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

centos-ci commented:
"""
Can one of the admins verify this patch?
"""

See the full comment at https://github.com/SSSD/sssd/pull/933#issuecomment-552523670