Add documentation on how to use the @EntityListeners annotation

[wimdeblauwe]

I was trying out the auditing support, but I did not get it working from the documentation alone. Luckily, I found http://www.petrikainulainen.net/programming/spring-framework/spring-data-jpa-tutorial-auditing-part-one/ that explained I neede the @EntityListeners annotation (I am not using an orm.xml). I think it would be good to add this to the official docs as well.

[odrotbohm]

That's merged, thanks!

[halower]

I have an audit interceptor very similar to this : http://www.mkyong.com/hibernate/hibernate-interceptor-example-audit-log/

Whenever i do in my service method:

 User user = this.userRepository.findOne(id);
 user.setX(x);
 user.setY(y);
I get an audit just fine! works perfect.

But when i use a query from whithin the respository like so:

UserRepository {

   @Query("UPDATE User u SET u.password = ?2 WHERE u.id = ?1 ")
   @Modifying
   public void updatePassword(Long userId, String encodedPassword);

}  

I always thought that since spring-boot-jpa supports @query, it definitely supports auditing. However, the reality is very bad. The official documentation is not clear enough, so I have dug a big pit.，because my project is nearing the end, only to find this problem, so it is impossible to switch other ways, do not know how to solve it, or alternatives，I hope everyone can help me, I will wait for results online.

[pivotal-issuemaster]

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[wimdeblauwe]

@halower I suggest to ask this kind of question on StackOverflow as your comment is not directly related to this PR.