powerpay fix

git-svn-id: https://plugins.svn.wordpress.org/authorizenet-payment-gateway-for-woocommerce/trunk@780551 b8457f37-d9ea-0310-8a92-e5e31aec5664
fix powerpay 

git-svn-id: https://plugins.svn.wordpress.org/authorizenet-payment-gateway-for-woocommerce/trunk@780555 b8457f37-d9ea-0310-8a92-e5e31aec5664