[SSSD] [sssd PR#355][comment] localauth plugin: change return code of sss_an2ln

[fidencio]

  URL: https://github.com/SSSD/sssd/pull/355
Title: #355: localauth plugin: change return code of sss_an2ln

fidencio commented:
"""
retest this, please
"""

See the full comment at https://github.com/SSSD/sssd/pull/355#issuecomment-324588776