Author: jerome mouneyrac
hub MDL-23769 fill empty education level and audience help strings
http://git.moodle.org/gw?p=moodle.git;a=commit;h=b3dbdce8221ea952e6a653c4f64f18278c4b4850
http://github.com/moodle/moodle/commit/b3dbdce8221ea952e6a653c4f64f18278c4b4850
+ 2.0 en [audience_help,core_hub]
+ 2.0 en [educationallevel_help,core_hub]