SSSDConfigTest: Remove usage of failUnless
src/config/SSSDConfigTest.py:1855: DeprecationWarning: Please use assertTrue instead.
self.failUnless(domain.get_name() in sssdconfig.list_domains())
src/config/SSSDConfigTest.py:1856: DeprecationWarning: Please use assertTrue instead.
self.failUnless(domain.get_name() in sssdconfig.list_inactive_domains())
src/config/SSSDConfigTest.py:1585: DeprecationWarning: Please use assertTrue instead.
self.failUnless(service.get_name() in sssdconfig.list_services())
Merges: https://pagure.io/SSSD/sssd/pull-request/3927
Reviewed-by: Jakub Hrozek <jhrozek@redhat.com>