Added user service to CI/CD, fixed some tests

.gitlab-ci.yml

...ervice/src/main/java/at/tuwien/endpoint/ViewEndpoint.java

...rc/test/java/at/tuwien/endpoint/ViewEndpointUnitTest.java

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

...t/java/at/tuwien/service/QueryServiceIntegrationTest.java

.../at/tuwien/service/StoreServiceIntegrationModifyTest.java

...va/at/tuwien/service/StoreServiceIntegrationReadTest.java

...va/at/tuwien/service/TableServiceIntegrationReadTest.java

...src/test/java/at/tuwien/service/TableServiceUnitTest.java

...st/java/at/tuwien/service/ViewServiceIntegrationTest.java