Check for services deleted to break loops in base_services_start
    
    https://bugzilla.redhat.com/show_bug.cgi?id=1600823 shows a
    case where systemd throws a service that would usually have been
    started out of the boot process *entirely* in order to resolve a
    dependency loop. This means the service won't show up as failed,
    it will just be inactive when it should be active. This still
    should constitute a failure of this test, so let's add a check
    for the log message that indicates this situation.
    
    Signed-off-by: Adam Williamson <awilliam@redhat.com>