OZG-3947 Search for Bearbeiter by full name

...-manager-server/src/main/java/de/itvsh/kop/user/User.java

...erver/src/main/java/de/itvsh/kop/user/UserRepository.java

...r/src/main/java/de/itvsh/kop/user/UserResourceMapper.java

...src/test/java/de/itvsh/kop/user/UserRepositoryITCase.java

...r/src/test/java/de/itvsh/kop/user/UserRepositoryTest.java

...c/test/java/de/itvsh/kop/user/UserResourceMapperTest.java

...rver/src/test/java/de/itvsh/kop/user/UserTestFactory.java