* revise purchase_packing_list_builder and sale_packing_list_builder using new API.
* use  delivery_causality_workflow instead of invoice_causality_workflow in Internal Packing List, Purchase Packing List and Sale Packing List.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@23658 20353a03-c40f-0410-a6d1-a30d3c3de9de