[FIX] base_import: Customer rank with imported user
[FIX] base_import: Customer rank with imported user

When making a test import for new users, there don't be present
in DB, so the computation of the customer/supplier rank will raise
an error.

Manage the case when user is not yet present in DB.

closes odoo/odoo#35955

Signed-off-by: Yannick Tivisse (yti) <200a91eb0e5cc4726d6a3430713b580138f34298@odoo.com>
ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo