Added @Transactional annotation for DeliveryItemServiceImpl class
Merge branch 'master' of https://github.com/Myhall/PA165_DeliveryService.git
Merge branch 'master' of https://github.com/Myhall/PA165_DeliveryService.git
Merge branch 'master' of https://github.com/Myhall/PA165_DeliveryService.git
DeliveryItemServiceImpl - modified methods to throw nullpointerexceptions in case null param is passed
CustomerServiceTest implemented