api upgrade for varmaker

- self.varmaker is now defined on self._cw
- self.initialize_varmaker is not required anymore

views.py

@@ -217,5 +217,4 @@
     jsonmeth = 'add_comment'
 
     def call(self, commented):
-        self.initialize_varmaker()
         newcomment = self._cw.vreg['etypes'].etype_class('Comment')(self._cw)
@@ -221,5 +220,5 @@
         newcomment = self._cw.vreg['etypes'].etype_class('Comment')(self._cw)
-        newcomment.eid = self.varmaker.next()
+        newcomment.eid = self._cw.varmaker.next()
         self.comment_form(commented, newcomment)