Notify bugsnag and execute post checkout actions (reset to cart state) whenever there's a payment gateway exceeption raised

app/controllers/checkout_controller.rb

@@ -254,6 +254,9 @@ class CheckoutController < Spree::StoreController
   end
 
   def rescue_from_spree_gateway_error(error)
+    Bugsnag.notify(error)
+    checkout_failed
+
     flash[:error] = t(:spree_gateway_error_flash_for_checkout, error: error.message)
     # This can also happen during the edit action
     #   but the response needed here is the same as when the update action fails