Author: Jerome Mouneyrac
MDL-27565 implement moodle_notes_create_note
http://git.moodle.org/gw?p=moodle.git;a=commit;h=8d46dabb6e1dd951d7022d2c14fcccf5d1260d4d
http://github.com/moodle/moodle/commit/8d46dabb6e1dd951d7022d2c14fcccf5d1260d4d
+ 2.1dev en [invalidcourseid,core_notes]
+ 2.1dev en [invaliduserid,core_notes]