Item set as only Entity
Removes EclipseLink Dependencies

Going to use Hibernate Persistence Provider
Add createItem() in ItemService

Basic ItemService implementation
Configure Hibernate as Persistence Provider for JPA 2
Configure JpaConfig, substitute package with AppConfig.class

Add PersistenceAnnotationBeanPostProcessor instead of packages in
AnnotationConfigApplicationContext
Rename AppConfig to AppContext
Revert "Rename AppConfig to AppContext"

This reverts commit 8b201e98848c48d893a2da62536550ee74f9caec.
Basic formatting in ServerApp
Initiate ApplicationContext with packagesToScan

Initiating with AppConfig.class create error "NoSuchBeanException"
Add hibernate-validator to dependency