Author: Aparup Banerjee
MDL-28126 webservice : string fixed.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=90f345d02fbe89af0b63635af8227cb24e511c86
http://github.com/moodle/moodle/commit/90f345d02fbe89af0b63635af8227cb24e511c86
+ 2.0 en [forbiddenwsuser,core_webservice]