fi'x():连接mqtt配置信息更正

src/main/java/com/muyu/service/impl/VehicleInstanceServiceImpl.java

@@ -119,7 +119,7 @@ public class VehicleInstanceServiceImpl implements VehicleInstanceService {
         }
         MqttServerModel mqttServerModel = result.getData();
         MqttProperties mqttProperties = MqttProperties.builder()
-                .broker(mqttServerModel.getBroker())
+                .broker("tcp://"+mqttServerModel.getBroker()+":1883")
                 .topic(mqttServerModel.getTopic())
                 .clientId(vin)
                 .username(connectionReq.getUserName())