Fix more tests

.gitlab-ci.yml

...ice/src/main/java/at/tuwien/endpoints/SubsetEndpoint.java

...service/src/test/java/at/tuwien/config/MariaDbConfig.java

.../test/java/at/tuwien/endpoint/SubsetEndpointUnitTest.java

...ava/at/tuwien/gateway/MetadataServiceGatewayUnitTest.java

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

.../java/at/tuwien/service/SubsetServiceIntegrationTest.java

...rvice/rest-service/src/test/resources/init/querystore.sql

...va/at/tuwien/gateway/impl/MetadataServiceGatewayImpl.java

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