@AfterAll
    public static void after() throws MqttException {
        mqttClient.disconnect();

        container.stop();
    }
@author Younsung Hwang
@author Taejin Koo
agent-module/plugins-it/paho-mqtt-it/src/test/java/com/navercorp/pinpoint/it/plugin/paho/mqtt/PahoMqttV3ClientIT.java