Changes to Add item to hotlist

added the new optional request property ticketAttraction

added the new optional request property airportExtras/items/travellers/items/telephone

added the new optional request property carRental/additionalDriver/telephone

added the new optional request property carRental/driver/telephone

added the new optional request property carRental/extras/items/participants/items/telephone

added the new optional request property extras/items/participants/items/telephone

added the new optional request property routes/items/extras/items/participants/items/telephone

added the new optional request property transfer/extras/items/participants/items/telephone

added the new optional request property transfer/travellers/items/telephone