Author: Mark Nelson
MDL-40061 mod_data: replaced 'fields update' add_to_log call with an event
http://git.moodle.org/gw?p=moodle.git;a=commit;h=d1ec55570dfc0fd763b47b33985e0cfd7ef79171
http://github.com/moodle/moodle/commit/d1ec55570dfc0fd763b47b33985e0cfd7ef79171
+ 2.7 en [eventfieldupdated,mod_data]