use restrictedTraverse instead of traverseName that is now private since Zope2-2.13.21.

Conflicts:
	bt5/erp5_forge/bt/revision

bt5/erp5_forge/SkinTemplateItem/portal_skins/erp5_vcs/BusinessTemplate_doVcsLogin.xml

@@ -52,7 +52,7 @@
             <key> <string>_body</string> </key>
             <value> <string>context.getVcsTool().setLogin(auth, user, password)\n
 \n
-return context.REQUEST.traverseName(context, caller)(**caller_kw)\n
+return context.restrictedTraverse(caller)(**caller_kw)\n
 </string> </value>
         </item>
         <item>

bt5/erp5_forge/bt/revision

-663
\ No newline at end of file
+677