Added User modify

Makefile

fda-authentication-service/dbrepo-realm.json

fda-user-service/Dockerfile

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

.../rest-service/src/main/resources/application-insecure.yml

...ice/rest-service/src/main/resources/application-local.yml

...r-service/rest-service/src/main/resources/application.yml

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

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

...rc/main/java/at/tuwien/gateway/GatewayServiceGateway.java

...ava/at/tuwien/gateway/impl/GatewayServiceGatewayImpl.java

...rc/main/java/at/tuwien/repository/jpa/UserRepository.java

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

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