message: Stress test: fix another hang by waiting for connected event on the runtimei
  Since we checked `runtime.connected`, we should listen the `connected` event from there instead of on in the `deltamanager`, which might have a different value.
diff: @@ -58,11 +58,11 @@ export class LoadTestDataStoreModel {
  resolve();
  };
  const disposeListener = () => {
  - runtime.deltaManager.off("connect", connectListener);
  + runtime.off("connected", connectListener);
  reject(new Error("disposed"));
  };
  - runtime.deltaManager.once("connect", connectListener);
  + runtime.once("connected", connectListener);
  runtime.once("dispose", disposeListener);
  });
  }
  