[REF] sale: tests: make tests independent from mail
[REF] sale: tests: make tests independent from mail

Purpose is to be able to move mail tests in a separate module without
breaking other tests. It seems dependency is not real, only some data
to add. It is better to have self contained tests anyway.

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