Usecase to reproduce:
- Set a product with the same lot in different locations
- Create a MO that will uses theses products and that require more than one location
- Produce it.
-> Traceback Expected singleton: stock.move.line
It happens because product produce only expect one move line
by lot. Howeever it could exist more than one move line if the
product for a specific lot are shared among multiple under location.
This commit try to fill the move line with the correct quantity
one by one and add the extra in a new move line.
Arnold Moyaux
1f860fea38