ingadhoc/account-payment#762

Created by Camila Vives

Blocked

label
adhoc-dev:18.0-h-98310-cav
head
98878226b33d707ebfae797e58391ef3eaa93947
ingadhoc/odoo-argentina ingadhoc/account-payment
18.0 #1186 missing r+ #762 missing r+
19.0

[FIX] account_payment: fix payment_total with write_off_amount and payment_type

Adds a method to get the signed write_off_amount
and use it in the compute of payment_total depending on payment_type