Merge branch 'dev' into 334-bug-creating-a-view-causes-error-while-sniffing-nodes

...entities/src/main/java/at/tuwien/entities/user/Group.java

...rc/main/java/at/tuwien/entities/user/GroupMembership.java

...main/java/at/tuwien/entities/user/GroupMembershipKey.java

...entities/src/main/java/at/tuwien/entities/user/Realm.java

.../main/java/at/tuwien/entities/user/RealmDefaultGroup.java

...in/java/at/tuwien/entities/user/RealmDefaultGroupKey.java

.../entities/src/main/java/at/tuwien/entities/user/Role.java

.../entities/src/main/java/at/tuwien/entities/user/User.java

...tadata-db/test/src/main/java/at/tuwien/test/BaseTest.java

dbrepo-user-service/Dockerfile

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

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

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

.../src/main/java/at/tuwien/config/AuthenticationConfig.java

...e/services/src/main/java/at/tuwien/mapper/UserMapper.java

...a/at/tuwien/repository/mdb/GroupMembershipRepository.java

...c/main/java/at/tuwien/repository/mdb/GroupRepository.java

...rc/main/java/at/tuwien/repository/mdb/RoleRepository.java

...services/src/main/java/at/tuwien/service/UserService.java

...src/main/java/at/tuwien/service/impl/UserServiceImpl.java