TEST: Add regression test for ticket #3179
    
    Resolves:
    https://fedorahosted.org/sssd/ticket/3179
    
    Reviewed-by: Lukáš Slebodník <lslebodn@redhat.com>
    Reviewed-by: Pavel Březina <pbrezina@redhat.com>
    (cherry picked from commit 1c72723cde8bea0d390b928c7cd29e48e7a7deab)