Member 관련 기능 리팩토링

[whitem4rk]

• [x] VO
• [x] VO test
• [x] entity
• [x] entity test
• [x] DTO
• [x] service
• [x] service test
• [x] repository
• [x] repository test
• [x] controller
• [x] controller test
• [x] exception
• [x] security
• [x] security test
• [x] Team 삭제
• [x] majorInfo VO, entity, DTO
• [x] majorInfo VO, entity, DTO test
• [x] majorInfo repository, service
• [x] majorInfo repository, service test