**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
help="The procurement quantity will be rounded up to this multiple.  If it is 0, the exact quantity will be used.  "),
        'procurement_ids': fields.one2many('procurement.order', 'orderpoint_id', 'Created Procurements'),
        'group_id': fields.many2one('procurement.group', 'Procurement Group', help="Moves created through this orderpoint will be put in this procurement group. If none is given, the moves generated by procurement rules will be grouped into one big picking.", copy=False),
        'company_id': fields.many2one('res.company', 'Company', required=True),
    }
    _defaults = {
        'active': lambda *a: 1,
        'logic': lambda *a: 'max',
        'qty_multiple': lambda *a: 1,
        'name': lambda self, cr, uid, context: self.pool.get('ir.sequence').get(cr, uid, 'stock.orderpoint') or '',
        'product_uom': lambda self, cr, uid, context: context.get('product_uom', False),
        'company_id': lambda self, cr, uid, context: self.pool.get('res.company')._company_default_get(cr, uid, 'stock.warehouse.orderpoint', context=context)
    }
    _sql_constraints = [
        ('qty_multiple_check', 'CHECK( qty_multiple >= 0 )', 'Qty Multiple must be greater than or equal to zero.'),
    ]
    _constraints = [
        (_check_product_uom, 'You have to select a product unit of measure in the same category than the default unit of measure of the product', ['product_id', 'product_uom']),
    ]
    def default_get(self, cr, uid, fields, context=None):
        warehouse_obj = self.pool.get('stock.warehouse')
        res = super(stock_warehouse_orderpoint, self).default_get(cr, uid, fields, context)
        
        if 'warehouse_id' not in res:
            warehouse_ids = res.get('company_id') and warehouse_obj.search(cr, uid, [('company_id', '=', res['company_id'])], limit=1, context=context) or []
            res['warehouse_id'] = warehouse_ids and warehouse_ids[0] or False
        if 'location_id' not in res:
            res['location_id'] = res.get('warehouse_id') and warehouse_obj.browse(cr, uid, res['warehouse_id'], context).lot_stock_id.id or False
        return res
    def onchange_warehouse_id(self, cr, uid, ids, warehouse_id, context=None):