[SSSD] [sssd PR#556][comment] COVERITY: Add coverity support

[fidencio]

URL: https://github.com/SSSD/sssd/pull/556
Title: #556: COVERITY: Add coverity support

fidencio commented:
"""
https://travis-ci.org/SSSD/sssd/builds/368726074
"""

See the full comment at https://github.com/SSSD/sssd/pull/556#issuecomment-382811859