GWT: x.x, Change name "DictionnaryPermission" to "LexiconPermission" - STEP 2
The term ‘Dictionary’ is inappropriate and incorrectly spelled
see: #432
phase 2 - Suppress the retro-compatibility for LexiconPermission
(from redmine: issue id 1088, created on 2014/10/22 by Matthieu Decorde)