[FIX] sale_mrp: COGS in case of kit
[FIX] sale_mrp: COGS in case of kit

When a kit is sold, the unit price of the COGS recorded is the sum of
the unit prices of each component multiplies by the quantity sold.
Obviously, this is not correct since the unit price should not take into
account the quantity sold.

opw-681403

ygol/odoo,ygol/odoo,dfang/odoo,microcom/odoo,dfang/odoo,storm-computers/odoo,ygol/odoo,laslabs/odoo,Elico-Corp/odoo_OCB,dfang/odoo,ygol/odoo,laslabs/odoo,laslabs/odoo,dfang/odoo,bplancher/odoo,dfang/odoo,microcom/odoo,microcom/odoo,storm-computers/odoo,Elico-Corp/odoo_OCB,hip-odoo/odoo,hip-odoo/odoo,Elico-Corp/odoo_OCB,ygol/odoo,laslabs/odoo,hip-odoo/odoo,bplancher/odoo,bplancher/odoo,Elico-Corp/odoo_OCB,ygol/odoo,laslabs/odoo,dfang/odoo,storm-computers/odoo,storm-computers/odoo,bplancher/odoo,Elico-Corp/odoo_OCB,microcom/odoo,laslabs/odoo,storm-computers/odoo,storm-computers/odoo,microcom/odoo,hip-odoo/odoo,ygol/odoo,hip-odoo/odoo,bplancher/odoo,bplancher/odoo,Elico-Corp/odoo_OCB,microcom/odoo,hip-odoo/odoo