code: def complete_experiment(self, status):
          
          url = self.driver.current_url
          p = urllib.parse.urlparse(url)
          complete_url = "%s://%s/%s?participant_id=%s"
          complete_url = complete_url % (p.scheme, p.netloc, status, self.participant_id)
          self.driver.get(complete_url)
          logger.info("Forced call to %s: %s" % (status, complete_url))
docs: Sends worker status ('worker_complete' or 'worker_failed')
          to the experiment server.