Fix conflict between unused Spree::CheckoutHelper in spree_core and the required ::CheckoutHelper in OFN
Fix conflict between unused Spree::CheckoutHelper in spree_core and the required ::CheckoutHelper in OFN

The OFN checkoutHelper was not being included and instead the Spree::CheckoutHelper, that doesnt have the necessary helpers, was used

openfoodfoundation/openfoodnetwork,lin-d-hop/openfoodnetwork,openfoodfoundation/openfoodnetwork,mkllnk/openfoodnetwork,mkllnk/openfoodnetwork,mkllnk/openfoodnetwork,Matt-Yorkley/openfoodnetwork,openfoodfoundation/openfoodnetwork,openfoodfoundation/openfoodnetwork,lin-d-hop/openfoodnetwork,Matt-Yorkley/openfoodnetwork,lin-d-hop/openfoodnetwork,mkllnk/openfoodnetwork,lin-d-hop/openfoodnetwork,Matt-Yorkley/openfoodnetwork,Matt-Yorkley/openfoodnetwork