Set conState when disconnecting forcibly

Sending the disconnect packet can take some time and it may lead to some already alredy (dis)connecting exceptions. Setting the proper state fixes the issue.

Signed-off-by: Ing. Jan Kaláb <jan+github@kalabovi.org>

Author: Pitel

org.eclipse.paho.client.mqttv3/src/main/java-templates/org/eclipse/paho/client/mqttv3/internal/ClientComms.java

@@ -530,6 +530,7 @@ public void disconnectForcibly(long quiesceTimeout, long disconnectTimeout) thro
 	 * @throws MqttException if an error occurs whilst disconnecting
 	 */
 	public void disconnectForcibly(long quiesceTimeout, long disconnectTimeout, boolean sendDisconnectPacket) throws MqttException {
+		conState = DISCONNECTING;
 		// Allow current inbound and outbound work to complete
 		if (clientState != null) {
 			clientState.quiesce(quiesceTimeout);