HF: fix old drp payments execution

(cherry picked from commit 696dcadd)

internal/service/service_callback.go

@@ -96,7 +96,9 @@ func (srv *serviceImpl) setPaymentStatus(
 
 	switch req.GetStatus() {
 	case cardpayment.PaymentStatus_PROCESSING:
-		payment.NewStatus = invoice.PaymentStatus_PAYMENT_PENDING
+		if payment.Status == invoice.PaymentStatus_UNKNOWN_PAYMENT_STATUS {
+			payment.NewStatus = invoice.PaymentStatus_PAYMENT_PENDING
+		}
 	case cardpayment.PaymentStatus_SUCCEEDED:
 		if data.SubscriptionURL == "" {
 			payment.NewStatus = invoice.PaymentStatus_PAYMENT_SUCCESS