Also push reservation amount to datalayer when configured.
In some business cases, for example prepayment, when contact chooses payment method prepayment for their ticket (which they will pay it later), a reservation order will be created for this kind of payment. And in this case, the amount of the order is not push to datalayer, therefore, the report at
Getting started
A new key (config.datalayer.alsoPushReservationAmount) is introduced for each point of sales that allowing the operator to decide if the reservation amount should also be sent to datalayer.
