commit #9 - updating entities and repositories to reflect changes to database

...pi/src/main/java/com/diss/omppapp/api/AuthController.java

...main/java/com/diss/omppapp/api/MinutePaperController.java

.../main/java/com/diss/omppapp/api/SubmissionController.java

...rc/main/java/com/diss/omppapp/api/UserInfoController.java

...src/main/java/com/diss/omppapp/entities/AnswerEntity.java

.../src/main/java/com/diss/omppapp/entities/ClassEntity.java

...va/com/diss/omppapp/entities/ClassMinutePapersEntity.java

.../java/com/diss/omppapp/entities/ClassMinutePapersKey.java

...in/java/com/diss/omppapp/entities/LecturerClassesKey.java

...ava/com/diss/omppapp/entities/LecturerClassessEntity.java

...c/main/java/com/diss/omppapp/entities/LecturerEntity.java

...ain/java/com/diss/omppapp/entities/MinutePaperEntity.java

...c/main/java/com/diss/omppapp/entities/QuestionEntity.java

.../java/com/diss/omppapp/entities/StudentClassesEntity.java

...ain/java/com/diss/omppapp/entities/StudentClassesKey.java

...rc/main/java/com/diss/omppapp/entities/StudentEntity.java

...main/java/com/diss/omppapp/entities/SubmissionEntity.java

...com/diss/omppapp/repositories/AnswerEntityRepository.java

.../com/diss/omppapp/repositories/ClassEntityRepository.java

...ppapp/repositories/ClassMinutePapersEntityRepository.java