Add coverage reporting to CI/CD-Runner

.gitlab-ci.yml

 image: maven:3.8.6-eclipse-temurin-17
 
-
+test:
+    script:
+        - mvn $MAVEN_CLI_OPTS clean org.jacoco-maven-plugin:prepare-agent test jacoco:report
+    artifacts:
+        reports:
+            coverage_report:
+                coverage_format: jacoco
+                path: target/site/jacoco/jacoco.xml
 build:
     script:
         - cd CityDoctorParent

CityDoctorParent/Extensions/CityDoctorGUI/src/main/java/de/hft/stuttgart/citydoctor2/gui/MainWindow.java

@@ -1158,7 +1158,6 @@ public class MainWindow extends Application {
         searchBtn.fire();
         featureView.getSelectionModel().select(0);
         featureView.getSelectionModel().getSelectedItem().getValue().visit(renderer);
-
     }
 
     private Pair<Tab,TreeView<Renderable>> getFeatureTabOf(CityObject co) {