Merge pull request #2493 from HugsDaniel/2433-change-from-simple-product-to-base-product

Reimplement Spree's simple_product in OFN factory

spec/factories.rb

@@ -453,6 +453,10 @@ FactoryBot.define do
       Spree::Image.create(attachment: image, viewable_id: product.master.id, viewable_type: 'Spree::Variant')
     end
   end
+
+  factory :simple_product, parent: :base_product do
+    on_hand 5
+  end
 end