Shopify/active_merchant — pull request #1244 by speric (2014-06-04 15:51:07+00:00)
Title: Braintree Blue: Set a smart default for verification_merchant_account_id

If the merchant has configured the `merchant_account_id` and they want to use the `verify_card` option, they probably want that verification run against their configured merchant account, since Braintree Blue allows for multiple merchant accounts. This sets a smart default for `verification_merchant_account_id`, while still allowing it to be set independently.