erp5_web_renderjs_ui: avoid DeprecationWarning not passing REQUEST as argument to setupCurrentSkin

This commit is to avoid this log entry:

2016-01-05 12:52:38,657 WARNING Script (Python):/erp5/portal_skins/erp5_web_renderjs_ui/WebSite_login:11 DeprecationWarning: setupCurrentSkin should be called with 'REQUEST' as argument. The BBB code will be removed in CMF 2.3.

bt5/erp5_web_renderjs_ui/SkinTemplateItem/portal_skins/erp5_web_renderjs_ui/WebSite_login.xml

@@ -62,7 +62,7 @@ if (came_from is None):\n
   came_from = context.getPermanentURL(context)\n
 \n
 portal.portal_skins.updateSkinCookie()\n
-portal.setupCurrentSkin()\n
+portal.setupCurrentSkin(REQUEST)\n
 \n
 if (portal.portal_membership.isAnonymousUser()):\n
   RESPONSE.expireCookie(\'__ac\', path=\'/\')\n