- implement invoice building from split packing list

 - remove not needed checks
 - support checking simulation movements in case of split parent movements
 - use total price from invoicing movement instead of order line, to support split packing list


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@26682 20353a03-c40f-0410-a6d1-a30d3c3de9de