**Impacted versions:** 8.0

**Steps to reproduce:**
To reproduce it is necessary the fifo configuration in the assignation of quants in moves.

- Create a sale order with two lines of the same product, one of that line with a route that generate moves between warehouse.

<img width="1231" alt="skitch 65" src="https://cloud.githubusercontent.com/assets/11341058/24102907/d575a638-0d53-11e7-922e-a3f034d43e94.png">

The route used has three pull rules:

1. From Stock Warehouse_1 to Virtual Locations/Inter Company Transit
2. From Virtual Locations/Inter Company Transit to Stock Warehouse_2
3. From Stock Warehouse_2 to Customers

<img width="1224" alt="skitch 66" src="https://cloud.githubusercontent.com/assets/11341058/24103147/b7c2bfbc-0d54-11e7-955c-87247a10e0bd.png">

- Confirm the sale order. It must be created three pickings:

<img width="1226" alt="skitch 67" src="https://cloud.githubusercontent.com/assets/11341058/24103498/d90c9b38-0d55-11e7-97ff-f986df8cdd9b.png">

- Transfer first two pickings.

<img width="1230" alt="skitch 70" src="https://cloud.githubusercontent.com/assets/11341058/24104496/b7b0be8a-0d58-11e7-89a2-4331fceec1d8.png">

- Before transfer third picking, review that one move has reserved the quant correctly because was reserved from the previous pickings.

<img width="1215" alt="skitch 68" src="https://cloud.githubusercontent.com/assets/11341058/24103908/23952cc8-0d57-11e7-9346-bd48d7edb54a.png">

**Current behavior:**

When check availability of this third picking, the quant already reserved is moved to the other move.

<img width="1264" alt="skitch 69" src="https://cloud.githubusercontent.com/assets/11341058/24104056/8be11616-0d57-11e7-8763-a90507315b19.png">
 
**Expected behavior:**

When check availability of this third picking, the moves already reserved must not be altered.


addons/stock/stock.py
origin = (move.group_id and (move.group_id.name + ":") or "") + (move.rule_id and move.rule_id.name or move.origin or move.picking_id.name or "/")
        group_id = move.group_id and move.group_id.id or False
        if move.rule_id:
            if move.rule_id.group_propagation_option == 'fixed' and move.rule_id.group_id:
                group_id = move.rule_id.group_id.id
            elif move.rule_id.group_propagation_option == 'none':
                group_id = False
        return {
            'name': move.rule_id and move.rule_id.name or "/",
            'origin': origin,
            'company_id': move.company_id and move.company_id.id or False,
            'date_planned': move.date,
            'product_id': move.product_id.id,
            'product_qty': move.product_uom_qty,
            'product_uom': move.product_uom.id,
            'product_uos_qty': (move.product_uos and move.product_uos_qty) or move.product_uom_qty,
            'product_uos': (move.product_uos and move.product_uos.id) or move.product_uom.id,
            'location_id': move.location_id.id,
            'move_dest_id': move.id,
            'group_id': group_id,
            'route_ids': [(4, x.id) for x in move.route_ids],
            'warehouse_id': move.warehouse_id.id or (move.picking_type_id and move.picking_type_id.warehouse_id.id or False),
            'priority': move.priority,
        }
    def _push_apply(self, cr, uid, moves, context=None):