[FIX] sale_coupon, sale_coupon_delivery: Wrong discount on promotion program

Let's consider a product P with a unit price = 100€
When a price list PL with a discount of 20% was applied, and
a coupon program CP with a discount of 10% was also applied,
system still calculated the rate based on unit price of the product
and not on the discounted price.

So in this example, the amount of the CP discount was 10€ instead of
8€ because the CP discount was computed on the unit price 100€
instead of the discounted price 80€ (with 20% discount of PL)

opw:2006829

X-port/Cherry-pick of odoo/enterprise@23739e8a71b3a107246fdae9f7208dfcd852ca09

0 files changed, 0 insertions, 0 deletions