[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:
"""
I have rebased my branch and fired a new build, let's see what happens.
"""

See the full comment at https://github.com/SSSD/sssd/pull/556#issuecomment-384955545