Persistent commercial ab test

This sets up a persistent ab test, for the commercial component. As we're sending the ab test segment to DFP, they can now use that as a targeting hook, e.g. show a different component if they're in the test or not

So not a true ab test, but allows us to get the benefits of it, i.e. remember what test you're in, pass the segment on to omniture, etc 
This is going to make another http request, why do you need to do this inline inside javascriptsLaterSteps?