Factorise inventory calls.

Add maculated stock node checks and generate "maculated banknotes" test cases.
Remove & correct commants.
Set causality on mutilated banknotes sent to headquaters.


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@15296 20353a03-c40f-0410-a6d1-a30d3c3de9de