Fix listing of enabled roles in `server-find`
    
    The roles can be thought of as membership attributes so we should only
    list
    them if `--all` is specified and `--no-members` is not.
    
    Also do not show them if `--raw` is passed in.
    
    https://fedorahosted.org/freeipa/ticket/5181
    
    Reviewed-By: Martin Basti <mbasti@redhat.com>