Modify the Reference Services Url for TripPin(read/write)

[moh-hassan]

Modify the Reference Services https://www.odata.org/odata-services/ for TripPin(read/write) to be:
https://services.odata.org/V4/TripPinServiceRW
instead of:
https://services.odata.org/TripPinRESTierService

The url: https://services.odata.org/TripPinRESTierService, cause errors when used with Simple.Client.Odata as described here

Also, the tutorial use /v4/ service.