Merge pull request #4286 from django-oscar/set-attributes-in-container

[FEAT] Add attribute setter in product attribute container

src/oscar/apps/catalogue/product_attributes.py

@@ -42,6 +42,9 @@ def attribute_values(self):
             .annotate(code=models.F("attribute__code"))
         )
 
+    def set_attributes(self, attributes):
+        self.__dict__["attributes"] = attributes
+
 
 class ProductAttributesContainer:
     """