message: connected state across hot restarts
diff: @@ -78,6 +78,10 @@ public:
  void onReceiveMessage(std::unique_ptr<ResponseProto>&& message) override {
  // Reset here so that it starts with fresh backoff interval on next disconnect.
  backoff_strategy_->reset();
  + // Some times during hot restarts this stat's value becomes inconsistent and will continue to
  + // have 0 till it is reconnected. Setting here ensures that it is consistent with the state of
  + // management server connection.
  + control_plane_stats_.connected_state_.set(1);
  handleResponse(std::move(message));
  }
  