OZG-7062 minor refactoring

user-manager-server/src/test/java/de/ozgcloud/user/keycloak/KeycloakUserRemoteServiceITCase.java

@@ -86,9 +86,8 @@ class KeycloakUserRemoteServiceITCase {
 		@Test
 		@Order(2)
 		void shouldUpdateOzgCloudUserId() {
-			User user = prepareUser();
 			var oldCloudUserId = getOzgCloudUserIdFromKeycloak();
-			service.updateOzgCloudUserId(user);
+			service.updateOzgCloudUserId(prepareUser());
 
 			var newCloudUserId = getOzgCloudUserIdFromKeycloak();