[FIX] stock: UoM on return lot
[FIX] stock: UoM on return lot

- Create a product with:
  Product UoM: kg
  Purchase UoM: lb(s)
  Tracking: By lot(s)
- Purchase 100 lb(s), validate and receive picking (set lot 001)
- Return the picking
- Set the lot

The quantity to do is 45.36 instead of 100.

We make sure to convert the quant UoM (=Product UoM) into the
appropriate UoM.

opw-771930

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