force_flush

        Flush the queue and publish everything to Splunk

def force_flush(
            self):
        """force_flush

        Flush the queue and publish everything to Splunk
        """
        self.debug_log('force flush requested')
        self.perform_work(
            self.queue,
            self.shutdown_event,
            self.shutdown_ack,
            self.already_done)