[FIX] stock: incorrect PO sequence
[FIX] stock: incorrect PO sequence

- Create 2 companies A & B
- Create a sequence for PO in each company
- Set User A in Company A and Admin in Company B
- Create a MTO product with a 'Buy' route
- Create a SO with User A using the product, validate

The PO created uses the sequence for Company B instead of Company A.

The creation is done as `sudo`, and ultimately `next_by_code` will use
the company of the Admin.

opw-1839656

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