Keep the original context when opening Product Quantities by Warehouse

The PYSON context only works when it is evaluated from keyword action.
When it is evaluated as the result of a wizard, there is no more any active*
keys in the context. So we must not change the context as we already have the
right inherited one from the view.

issue9884
review324561002

product.py

@@ -601,6 +601,7 @@ class OpenProductQuantitiesByWarehouse(Wizard):
 
     def do_open_(self, action):
         domain = [('date', '>=', self.record.date)]
+        action['pyson_context'] = '{}'
         action['pyson_search_value'] = PYSONEncoder().encode(domain)
         action['name'] += ' (' + self.record.rec_name + ')'
         return action, {}