* order lines are now not grouped anymore by account. That allows a more detailed label on the accrual entry line, as it's now directly related to a single order line
* we now create a single accrual entry counterpart, instead of one per order previously. That reduces the 'noise' in the accrual entry, at the cost of not having the sum per ordre anymore easilly but it doesn't seem to be important to audit that account
closesodoo/odoo#76037
Signed-off-by: Quentin De Paoli (qdp) <qdp@openerp.com>