add a missing method.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@33398 20353a03-c40f-0410-a6d1-a30d3c3de9de

bt5/erp5_simulation/DocumentTemplateItem/DeliverySimulationRule.py

@@ -111,3 +111,6 @@ class DeliveryRuleMovementGenerator(MovementGeneratorMixin):
         **kw)
       ret.append(simulation_movement)
     return ret
+
+  def _getInputMovementList(self, context):
+    return [context.getParentValue(),]