Method on_transport_error

cpp/src/reconnect_test.cpp:164–167

  }

  void on_transport_error(proton::transport& t) override {
    ASSERT_EQUAL(bool(transport_error_count), t.connection().reconnected());
    transport_error_count++;
  }

  void on_transport_close(proton::transport& t) override {
    ASSERT_THROWS_MSG(proton::error, "No active connection", t.connection().url());