Delete //@TestOnly methods

...va/org/fuseri/moduleexercise/answer/AnswerController.java

...n/java/org/fuseri/moduleexercise/answer/AnswerFacade.java

...va/org/fuseri/moduleexercise/answer/AnswerRepository.java

.../java/org/fuseri/moduleexercise/answer/AnswerService.java

.../java/org/fuseri/moduleexercise/common/DomainService.java

...rg/fuseri/moduleexercise/exercise/ExerciseController.java

...va/org/fuseri/moduleexercise/exercise/ExerciseFacade.java

...rg/fuseri/moduleexercise/exercise/ExerciseRepository.java

...a/org/fuseri/moduleexercise/exercise/ExerciseService.java

...va/org/fuseri/moduleexercise/question/QuestionFacade.java

...rg/fuseri/moduleexercise/question/QuestionRepository.java