Merge branch '314-frontend-bugs' into 'dev'

dbrepo-authentication-service/Dockerfile

dbrepo-authentication-service/dbrepo-realm.json

dbrepo-authentication-service/generate-keystore.sh

dbrepo-authentication-service/server.keystore

dbrepo-container-service/pom.xml

.../src/main/java/at/tuwien/endpoints/ContainerEndpoint.java

.../at/tuwien/endpoint/ContainerEndpointIntegrationTest.java

...st/java/at/tuwien/endpoint/ContainerEndpointUnitTest.java

...java/at/tuwien/endpoint/ImageEndpointIntegrationTest.java

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

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

...ces/src/main/java/at/tuwien/service/ContainerService.java

...ain/java/at/tuwien/service/impl/ContainerServiceImpl.java

...e/src/main/java/at/tuwien/endpoints/DatabaseEndpoint.java

...est/java/at/tuwien/endpoint/DatabaseEndpointUnitTest.java

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

.../main/java/at/tuwien/gateway/ContainerServiceGateway.java

...a/at/tuwien/gateway/impl/ContainerServiceGatewayImpl.java

...ces/src/main/java/at/tuwien/service/ContainerService.java

...ain/java/at/tuwien/service/impl/ContainerServiceImpl.java