Restore calculate order total code

Author: hoffmabc

core/order.go

@@ -1098,12 +1098,21 @@ func (n *OpenBazaarNode) CalculateOrderTotal(contract *pb.RicardianContract) (*b
 
 	for _, item := range v5Order.Items {
 		var itemOriginAmt *repo.CurrencyValue
+		l, err := ParseContractForListing(item.ListingHash, contract)
+		if err != nil {
+			return big.NewInt(0), fmt.Errorf("listing not found in contract for item %s", item.ListingHash)
+		}
 
-		nrl, err := GetNormalizedListing(item.ListingHash, contract)
+		rl, err := repo.NewListingFromProtobuf(l)
 		if err != nil {
 			return big.NewInt(0), err
 		}
 
+		nrl, err := rl.Normalize()
+		if err != nil {
+			return big.NewInt(0), fmt.Errorf("normalize legacy listing: %s", err.Error())
+		}
+
 		// keep track of physical listings for shipping caluclation
 		if nrl.GetContractType() == pb.Listing_Metadata_PHYSICAL_GOOD.String() {
 			physicalGoods[item.ListingHash] = nrl