'Adds a client_id to the list of completed tasks.'

def MarkClientDone(self, client_id):

    self.RegisterCompletedClient(client_id)
    if self.runner_args.notification_event:
        status = rdf_hunts.HuntNotification(session_id=self.session_id, client_id=client_id)
        self.Publish(self.runner_args.notification_event, status)
