Increase coverage

dbrepo-data-service/pom.xml

...va/at/tuwien/listener/DefaultListenerIntegrationTest.java

...test/java/at/tuwien/listener/DefaultListenerUnitTest.java

.../src/test/java/at/tuwien/mvc/ActuatorEndpointMvcTest.java

...rc/test/java/at/tuwien/mvc/PrometheusEndpointMvcTest.java

...e/src/test/java/at/tuwien/mvc/SwaggerEndpointMvcTest.java

...ava/at/tuwien/service/DatabaseServiceIntegrationTest.java

...t/java/at/tuwien/service/QueueServiceIntegrationTest.java

...st/java/at/tuwien/service/UserServiceIntegrationTest.java

...-service/src/test/java/at/tuwien/utils/RabbitMqUtils.java

...ce/rest-service/src/test/resources/application.properties

...ervices/src/main/java/at/tuwien/api/CachedConnection.java

...ervices/src/main/java/at/tuwien/config/MetricsConfig.java

...ces/src/main/java/at/tuwien/listener/DefaultListener.java

...ervices/src/main/java/at/tuwien/service/QueueService.java

...rc/main/java/at/tuwien/service/impl/QueueServiceImpl.java

...va/at/tuwien/service/ContainerServiceIntegrationTest.java

...t/java/at/tuwien/service/ImageServiceIntegrationTest.java

...a-service/test/src/main/java/at/tuwien/test/BaseTest.java