Add a new inventory line to test a case where the destination must be...

Add a new inventory line to test a case where the destination must be salle_tri.encaisse_des_externes .
Factorize multiple function to make it easier to add new cases.
Add new case for the added inventory line, and fix existing object count & total price tests.


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@17395 20353a03-c40f-0410-a6d1-a30d3c3de9de