Use total refunded amount instead of net amount refunded in the credit

[bazgear]

When doing a credit the current implementation sets the processed amount on the transaction to the net amount refunded (NETREFUNDAMT). I think this should be set to the total refunded amount (TOTALREFUNDEDAMOUNT) instead as this is the actual amount that is being refunded to the customer. The net amount excludes the fees and the fees will be refunded anyway (excluding the fixed fee).

Therefore i think the amount stored as refunded against the transaction should be the actual amount which was refunded to the customer.