Changes

 Access service for wall event
 Correction of some bugs:
 - supress the anotation transcient on verificationToken
 - persistence.xml in jsf need the class name of the entity
 - persistence.xml in rest need the class name of the entity
 - *.xml update the name of the atributes to the same in
   the database and add users and events to use in the test
 - UserEJB modification of the method sendConfirmationUrl
   because the other code not have a good functionality
   when the verificationToken is null
 Create:
 - EventEJB
 - EventEJBTest
 - ServiceTestSuite
 Update:
 - isEqualToUser ckeck the new attribute accepted
 - User add new attribute and put the method getter, setter
 and registeredUser with the javaDoc of the method
 - letta-mysql.full.sql is empty

Correction of some bugs:  - supress the anotation transcient on
verificationToken  - persistence.xml in jsf need the class name of the
entity  - persistence.xml in rest need the class name of the entity  -
*.xml update the name of the atributes to the same in    the database
and add users and events to use in the test  - UserEJB modification of
the method sendConfirmationUrl    because the other code not have a good
functionality    when the verificationToken is null
Create:
- EventEJB
- EventEJBTest
- ServiceTestSuite
- letta-mysql.inserts.sql
Update:
- isEqualToUser ckeck the new attribute accepted
- User add new attribute and put the method getter, setter
  and registeredUser with the javaDoc of the method
- Event.java is modified to put the size of attribute head to
  50 characters