-Modify "resource" field in AccountingCancellation form so that it's now a list field and it's non editable
-Modify script to check new constraints added on Accounting Cancellation

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@35333 20353a03-c40f-0410-a6d1-a30d3c3de9de