Refactored PaymentApiController to return PaymentResultDisplay
Merge remote-tracking branch 'merchello/1.4.0' into 1.4.0
Merge pull request #856 from rustyswayne/1.4.0

Refactored PaymentApiController to return PaymentResultDisplay
Merge remote-tracking branch 'merchello/1.4.0' into 1.4.0
Testing AuditLog API's GetSalesHistoryByInvoiceKey endpoint.