MAGETWO-91122: Html attributes auto removed from WYSIWYG Editor

Author: svitja

lib/web/mage/adminhtml/wysiwyg/tiny_mce/html5-schema.js

@@ -150,7 +150,7 @@ define([
             ['input button select textarea', 'autofocus'],
             ['input textarea', 'placeholder onselect onchange onfocus onblur'],
             ['link script img', 'crossorigin'],
-            ['div','aria-role'],
+            ['div','aria-role']
         ];
 
         rawData.forEach(function (data) {