Fix permission-find with sizelimit set
    
    If permission-find is fired with an argument and sizelimit set
    a message about truncation will be sent along with the result
    as the search in post_callback() does general search instead
    of having its filter properly set.
    
    https://fedorahosted.org/freeipa/ticket/5640
    
    Reviewed-By: Martin Basti <mbasti@redhat.com>