Author: Aparup Banerjee
MDL-28126 webservice : string fixed.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=47c3dfd5a4e5c5f1a632e8bd228a4140e299c432
http://github.com/moodle/moodle/commit/47c3dfd5a4e5c5f1a632e8bd228a4140e299c432
+ 2.3 en [forbiddenwsuser,core_webservice]