javaxb is no longer supported in the jdk11

I couldn't run the application since i was using java 13 . So  i searched for the solution . 

I found it on the first answer in the website   : https://stackoverflow.com/questions/57548038/error-creating-bean-with-name-entitymanagerfactory-not-fixed-by-javaxb-or-hibe

The code works well , Thank's . 

So just add the comment in case people are using java >= 11
