[FIX] mrp: keep traceability of procurement.group

Pass group_id information when a manufacturing order is created from
a procurement to keep a better traceability and know the reason of stock.move
creation.
Fixes #4019
Fixes #3851 Create invoice from picking copies some parameters from the order to the invoice
Merge branch '8.0' of https://github.com/odoo/odoo into 8.0-win32