Shopify/active_merchant — pull request #774 by spiritbear (2013-07-22 18:58:18+00:00)
Title: [Fixes #719] Cybersource recurring payments 

Cybersource recurring payments would give a 500 Internal Server Error, cybersource expects xml elements in the request to be ordered in a particular way, this patch generates xml elements in the correct order, also subscription params are not overriden in the method.