[FIX] snailmail_account: fix external test
[FIX] snailmail_account: fix external test

Since beaa30a3d1843de43a45f419bfbc1bfa7613a920, the external tests of snailmail was broken.

closes odoo/odoo#35087

Signed-off-by: Laurent Smet <1328e3a5817ff065354bd0f7f4073cbb6dcc7eca@users.noreply.github.com>
ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo