CC-5651: Unit Test the Scheduler

* Continued refactoring of the database creation.
* Database now persists after running tests but most of the tables are
  cleared.
* The unit tests run WAY faster now. :-)

airtime_mvc/tests/README.txt

@@ -35,3 +35,8 @@ with a version that's incompatible and gives an error for us.
     IMPORTANT: Make sure you use "sudo" with the "-E" flag so it preserves the environment variable we set before that.
 
 
+
+FAQ
+====
+- If you get errors about an AMPQ fwrite failing, it means your RabbitMQ credentials are wrong in airtime.conf.
+  (That's the airtime.conf in this directory.)