Activate reverse logistics builders in the tests

By adding returned_purchase_packing_list_builder and
purchase_packing_list_builder to Alarm_buildPackingList they are used in
tested alarms.

bt5/erp5_simulation_test/SkinTemplateItem/portal_skins/erp5_simulation_test/Alarm_buildPackingList.py

@@ -8,6 +8,8 @@ builder_id_list = (
   'internal_packing_list_builder',
   'sale_packing_list_builder',
   'purchase_packing_list_builder',
+  'returned_sale_packing_list_builder',
+  'returned_purchase_packing_list_builder',
 )
 
 for builder_id in builder_id_list: