[BF] Catch Exception on shutdown

IoT/Connector/Data/Mqtt/Mqtt.cs

@@ -42,10 +42,11 @@ namespace BlubbFish.Utils.IoT.Connector.Data {
 
     protected virtual void Dispose(Boolean disposing) {
       if(!this.disposedValue) {
-        if(disposing) {
-          this.client.MqttMsgPublishReceived -= this.Client_MqttMsgPublishReceived;
-          this.client.Unsubscribe(new String[] { "#" });
-          this.client.Disconnect();
+        if(disposing) {try {
+            this.client.MqttMsgPublishReceived -= this.Client_MqttMsgPublishReceived;
+            this.client.Unsubscribe(new String[] { "#" });
+            this.client.Disconnect();
+          } catch (Exception) { }
         }
 
         this.client = null;