Lots of refactoring

dbrepo-data-service/pom.xml

...s/src/main/java/at/tuwien/entities/database/Database.java

dbrepo-metadata-service/pom.xml

...tories/src/main/java/at/tuwien/mapper/MetadataMapper.java

...rc/main/java/at/tuwien/repository/DatabaseRepository.java

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

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

...ce/src/main/java/at/tuwien/endpoints/ConceptEndpoint.java

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

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

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

...vice/src/main/java/at/tuwien/endpoints/ImageEndpoint.java

...ce/src/main/java/at/tuwien/endpoints/LicenseEndpoint.java

...ce/src/main/java/at/tuwien/endpoints/MessageEndpoint.java

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

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

...vice/src/main/java/at/tuwien/endpoints/TableEndpoint.java

...rvice/src/main/java/at/tuwien/endpoints/UnitEndpoint.java

...rvice/src/main/java/at/tuwien/endpoints/UserEndpoint.java

...rvice/src/main/java/at/tuwien/endpoints/ViewEndpoint.java