Checks if Dir Server is installed and running before IPA installation
    
    In cases when IPA is installed in two steps (external CA), it's
    necessary to check (in the second step) if Dir. Server is
    running before continue with the installation. If it's not,
    start Directory Server.
    
    https://pagure.io/freeipa/issue/6611
    
    Reviewed-By: Fraser Tweedale <ftweedal@redhat.com>
    Reviewed-By: Tibor Dudlak <tdudlak@redhat.com>