Manage shipping for supplier shipment returns

We move the shipping code in mixin's such that it can be applied on other
shipments.
We define properties to abstract the information needed by the create shipping
wizards. Such that they can be execute on any shipment.

issue9850
review324521002

__init__.py

@@ -12,6 +12,7 @@ def register():
         carrier.CredentialDPD,
         carrier.Carrier,
         stock.ShipmentOut,
+        stock.ShipmentInReturn,
         module='stock_package_shipping_dpd', type_='model')
     Pool.register(
         stock.CreateShipping,

stock.py

@@ -21,17 +21,24 @@ from .configuration import get_client, SHIPMENT_SERVICE
 from .exceptions import DPDError
 
 
-class ShipmentOut(metaclass=PoolMeta):
-    __name__ = 'stock.shipment.out'
+class ShippingDPDMixin:
 
     def validate_packing_dpd(self):
-        warehouse_address = self.warehouse.address
-        if not warehouse_address:
+        warehouse = self.shipping_warehouse
+        if not warehouse.address:
             raise PackingValidationError(
                 gettext('stock_package_shipping_dpd'
                     '.msg_warehouse_address_required',
                     shipment=self.rec_name,
-                    warehouse=self.warehouse.rec_name))
+                    warehouse=warehouse.rec_name))
+
+
+class ShipmentOut(ShippingDPDMixin, metaclass=PoolMeta):
+    __name__ = 'stock.shipment.out'
+
+
+class ShipmentInReturn(ShippingDPDMixin, metaclass=PoolMeta):
+    __name__ = 'stock.shipment.in.return'
 
 
 class CreateShipping(metaclass=PoolMeta):
@@ -218,9 +225,10 @@ class CreateDPDShipping(Wizard):
                 'sendingDepot': credential.depot,
                 'product': shipment.carrier.dpd_product,
                 'sender': self.shipping_party(
-                    shipment.company.party, shipment.warehouse.address),
+                    shipment.company.party,
+                    shipment.shipping_warehouse.address),
                 'recipient': self.shipping_party(
-                    shipment.customer, shipment.delivery_address),
+                    shipment.shipping_to, shipment.shipping_to_address),
                 },
             'parcels': [self.get_parcel(p) for p in packages],
             'productAndServiceData': {