[FIX] website_sale_slides: set courses invoicing policy to Ordrered Quantities
[FIX] website_sale_slides: set courses invoicing policy to Ordrered Quantities

PURPOSE
=======

Since V13.3, the product "Taking care of Trees Course" has a Service Invoicing Policy
configured as "Milestones (manually set quantities on order)".
So, it's not possible to create an invoice from a SO.

SPECIFICATION
=============

The policy should be Ordered quantities

Taks ID: 2248213

closes odoo/odoo#51583

X-original-commit: 4883a4fa14dea966df2469ce6bc6cbc5cf5ee8c6
Signed-off-by: Thibault Delavallee (tde) <2d325771bb6e8870d87f0f3f7b45589a8338e550@openerp.com>

ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo