Shopify/active_merchant — pull request #963 by odorcicd (2013-12-17 21:29:53+00:00)
Title: Truncate enhancedData customerReference to 17 characters due to limitations by Litle library

@silverstreaked @melari

Problem: The Litle implementation limits `customerReference` to 17 characters, and going above throws an error:
`If enhancedData customerReference is specified, it must be between 1 and 17 characters long`