added conditional hash serialization

com.unity.perception/Runtime/Randomization/Scenarios/Serialization/ScenarioSerializer.cs

                     var bundle = (JObject) bundleToken;
                     scenario.AddBundleUrl(bundle["name"].Value<string>(), bundle["url"].Value<string>());
                 }
+
+                if (catalog.ContainsKey("hashUrl"))
+                    scenario.AddBundleUrl(catalog["hashName"].Value<string>(), catalog["hashUrl"].Value<string>());
             }
         }