Author: Simey Lameze
MDL-66034 core_role: implement role updated event
http://git.moodle.org/gw?p=moodle.git;a=commit;h=de4dc81b24696068075d5be20dc277fff72f14de
http://github.com/moodle/moodle/commit/de4dc81b24696068075d5be20dc277fff72f14de
+ 3.8 en [eventroleupdated,core_role]