Fix MqttConnectionSymbol

src/main/java/de/monticore/lang/embeddedmontiarc/tagging/middleware/mqtt/MqttConnectionSymbol.java

@@ -40,7 +40,7 @@ public class MqttConnectionSymbol extends MiddlewareSymbol {
     }
 
     public void setTopicName(String topicName) {
-        this.value.set(0, Optional.ofNullable(topicName));
+        this.values.set(0, Optional.ofNullable(topicName));
     }
 
     public Optional<String> getMsgField() {

src/main/java/de/monticore/lang/embeddedmontiarc/tagging/middleware/mqtt/MqttSymbolCreator.java

@@ -96,6 +96,8 @@ public class MqttSymbolCreator implements TagSymbolCreator {
                                 });
                     });
 
+
+            /**
             //Tags with TagValue
             tagElements.stream()
                     .filter(t -> t.getTagValueOpt().isPresent())
@@ -114,6 +116,7 @@ public class MqttSymbolCreator implements TagSymbolCreator {
                                             p.setMiddlewareSymbol(tmpSymbol);
                                         }
                                     }));
+                **/
         }
     }