message: ensure presence of bot.identity for spark
diff: @@ -129,6 +129,14 @@ function Sparkbot(configuration) {
  });
  };
  + controller.middleware.spawn.use(function(worker, next) {
  +
  + // copy the identity that we get when the app initially boots up
  + // into the specific bot instance
  + worker.identity = controller.identity;
  +
  + });
  +
  controller.middleware.ingest.use(function limitUsers(bot, message, res, next) {
  