Reset sale and shipment to draft before delete

Since 6c72b78d92d8 the documents are no more automatically cancelled prior
deletion.

modules/sale_shipment_grouping/tests/scenario_sale_shipment_grouping_multiple.rst

@@ -94,6 +94,7 @@ Check the shipments::
 
 Check grouping after deleting shipments::
 
+    >>> shipment.click('draft')
     >>> shipment.delete()
     >>> shipment, = ShipmentOut.find([
     ...         ('state', '=', 'waiting'),

modules/sale_stock_quantity/tests/scenario_sale_stock_quantity.rst

@@ -141,6 +141,7 @@ Sale 2 more products with not enough stock::
 
 Clean sales::
 
+    >>> Sale.click(Sale.find([]), 'draft')
     >>> Sale.delete(Sale.find([]))
 
 Sale 6 products with not enough stock::
@@ -198,4 +199,5 @@ Sale 2 products with enough forecast::
     >>> sale_line.product = product
     >>> sale_line.quantity = 2.0
     >>> sale.click('quote')
+    >>> sale.click('draft')
     >>> sale.delete()