cleans and improves JPA.

README.md

...main/java/fr/univtln/bruno/samples/jee91/dao/MainDAO.java

.../main/java/fr/univtln/bruno/samples/jee91/dao/Person.java

...in/java/fr/univtln/bruno/samples/jee91/dao/PersonDAO.java

...91/dao/entitymanagersproducers/EntityManagerProducer.java

...samples/jee91/dao/entitymanagersproducers/H2Database.java

...jee91/dao/entitymanagersproducers/PostgreSQLDatabase.java

entites/pom.xml

.../main/java/fr/univtln/bruno/samples/jee91/dao/Person.java

...ava/fr/univtln/bruno/samples/jee91/rs/SampleResource.java

restApp/src/main/resources/insert.sql

...main/java/fr/univtln/bruno/samples/jee91/ws/WSServer.java

wsApp/src/main/webapp/WEB-INF/beans.xml