use py__mro__ in a classes scope_names_generator

jedi/evaluate/compiled/__init__.py

@@ -114,7 +114,7 @@ class CompiledObject(Base):
         else:
             return type_names + self.instance_names()
 
-    def scope_names_generator(self, position=None):
+    def scope_names_generator(self, position=None, add_class_vars=True):
         yield self, self.get_defined_names()
 
     @underscore_memoization