Not able to reconcile the Invoice ID from First data Gateway Processor to civicrm

After making the Contribution through Civicrm Contribution page Invoice ID seems to be not present while sending request xml to First Data Gateway because of that it was not able to reconcile the Transaction report from the Gateway.
So we have attached the patch file which will pass the Invoice_number through request xml to First Data Gateway and also send request back to civicrm about the transaction id and Invoice.