- check behaviour of Invoice_getRemainingTotalPayablePrice in case if Payment Transaction is deleted
 - clean up site in tear down using user with Manager role to avoid issues with unaccessible objects


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@36887 20353a03-c40f-0410-a6d1-a30d3c3de9de