dont merge - highlight race conditions in chewie test cases

chewie tests load up all the responses and then set the ball rolling,
but we can't rely on the radius sender to always be called before the
radius receiver.

we should implement #68 and get the mocks nice and in lock-step to test
specific sequences of events

test/test_chewie.py

@@ -297,7 +297,9 @@ def test_success_dot1x(self):
         pool = eventlet.GreenPool()
         chewie_thread = pool.spawn(self.chewie.run)
 
-        eventlet.sleep(0.1)
+        while FROM_SUPPLICANT.qsize():
+            eventlet.sleep()
+        eventlet.sleep()
 
         self.assertEqual(
             self.chewie.get_state_machine('02:42:ac:17:00:6f',