test_hub_shutdown.py: check that shutdown() removes hub from threadlocal...

test_hub_shutdown.py: check that shutdown() removes hub from threadlocal storage even if hub was never switched to

greentest/test_hub_shutdown.py

@@ -2,3 +2,4 @@
 import gevent.hub
 res = gevent.hub.get_hub().shutdown()
 assert res is None, res
+assert 'hub' not in gevent.hub._threadlocal.__dict__, gevent.hub._threadlocal.__dict__