**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
picking_type_obj.write(cr, uid, warehouse.pack_type_id.id, {'active': new_delivery_step == 'pick_pack_ship'}, context=context)
        routes_dict = self.get_routes_dict(cr, uid, ids, warehouse, context=context)
        
        pull_obj.unlink(cr, uid, [pu.id for pu in warehouse.delivery_route_id.pull_ids], context=context)
        route_name, values = routes_dict[new_delivery_step]
        route_obj.write(cr, uid, warehouse.delivery_route_id.id, {'name': self._format_routename(cr, uid, warehouse, route_name, context=context)}, context=context)
        dummy, pull_rules_list = self._get_push_pull_rules(cr, uid, warehouse, True, values, warehouse.delivery_route_id.id, context=context)
        
        for pull_rule in pull_rules_list:
            pull_obj.create(cr, uid, vals=pull_rule, context=context)
        
        pull_obj.unlink(cr, uid, [pu.id for pu in warehouse.reception_route_id.pull_ids], context=context)
        push_obj.unlink(cr, uid, [pu.id for pu in warehouse.reception_route_id.push_ids], context=context)
        route_name, values = routes_dict[new_reception_step]
        route_obj.write(cr, uid, warehouse.reception_route_id.id, {'name': self._format_routename(cr, uid, warehouse, route_name, context=context)}, context=context)
        push_rules_list, pull_rules_list = self._get_push_pull_rules(cr, uid, warehouse, True, values, warehouse.reception_route_id.id, context=context)
        
        for push_rule in push_rules_list:
            push_obj.create(cr, uid, vals=push_rule, context=context)
        for pull_rule in pull_rules_list:
            
            pull_rule['procure_method'] = 'make_to_order'
            pull_obj.create(cr, uid, vals=pull_rule, context=context)
        route_obj.write(cr, uid, warehouse.crossdock_route_id.id, {'active': new_reception_step != 'one_step' and new_delivery_step != 'ship_only'}, context=context)
        
        dummy, values = routes_dict[new_delivery_step]
        mto_pull_vals = self._get_mto_pull_rule(cr, uid, warehouse, values, context=context)[0]
        pull_obj.write(cr, uid, warehouse.mto_pull_id.id, mto_pull_vals, context=context)
        return True
    def create_sequences_and_picking_types(self, cr, uid, warehouse, context=None):