get message id from token with DisconnectedMessageBuffer when offline publish.

Signed-off-by: ogis-yamazaki <Yamazaki_Shoji@ogis-ri.co.jp>

Author: ogis-yamazaki

org.eclipse.paho.client.mqttv3/src/main/java/org/eclipse/paho/client/mqttv3/internal/DisconnectedMessageBuffer.java

@@ -53,6 +53,11 @@ public DisconnectedMessageBuffer(DisconnectedBufferOptions options) {
 	 *             if the Buffer is full
 	 */
 	public void putMessage(MqttWireMessage message, MqttToken token) throws MqttException {
+		if (token != null) {
+			message.setToken(token);
+			token.internalTok.setMessageID(message.getMessageId());
+		}
+		
 		BufferedMessage bufferedMessage = new BufferedMessage(message, token);
 		synchronized (bufLock) {
 			if (buffer.size() < bufferOpts.getBufferSize()) {