AB test bail-out for any unsupported buttons or links.

[cgoudie]

When we run the A-B test with Delta, if they click on any of the features we haven't implemented for the test, we should send them to the existing page. This will require help from Delta for the CDN configuration.

Also if they are logged into their skymiles account they should not use the test.

Option a - For any of those clicks, we set a cookie saying not to use the test and force a page refresh.
Option b - We could add a hyperlink to these clicks to a hostname or add a query parameter which flags that the user should not use the test.

Either option, and also the login detection, need to be handled at the Delta CDN (I believe Akamai) layer and routed to their existing experience.