remove all dependencies on hardcoded test game 3 ("turn_active")

* Part of the work needed for #1468 
* Jenkins: http://jenkins.buttonweavers.com:8080/job/buttonmen-cgolubi1/395/

I've put in my over-two-hours, so i'm going to go ahead and issue a pull for what i've got --- migrating tests is an incremental process.  I'll do more this month if time permits, but i think removing the dependency on 3.json was the biggest single item of work remaining.