Need data source to get the mapping between Refund and Invoice after Invoice Settlement enabled

[Yolanda]

Before customers enable Invoice Settlement, they could use the data source RefundInvoicePayment to get the mapping between Refund and Invoice directly

Refund Invoice Payment Data Source

But once Invoice Settlement is enabled, they will have to do two export on RefundPart and PaymentPart and join the export result out of Zuora to get the same result.

So if we could have data source RefundInvoicePayment back, it will be much easier for the customers who have been using it before enabled Invoice Settlement.