Don't copy Payment Condition and Discount from Order to Packing List, they should not be present in Packing List.
Add a TODO marker for manually copied properties, it's better to use movement group instead.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@20972 20353a03-c40f-0410-a6d1-a30d3c3de9de