* remove payment_transaction_builder because now it is included in erp5_invoicing.
* use  delivery_causality_workflow instead of invoice_causality_workflow in Purchase Invoice Transaction and Sale Invoice Transaction.


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@23654 20353a03-c40f-0410-a6d1-a30d3c3de9de