Changes

[sto8 - task34] Rest - Events user who is the creator
added new attribute canceled in the letta-mysql.inserts.sql added new
method REST in eventResource.java to get the user's events witch the
user is the creator added the method witch obtain the list of events
from a user witch is the creator added the test of the method created 
created the xml file witch is used to test the new method created on the
Rest layer added in the configuration web.xml the security role of
registeredRole