Change fast shutdown timeout to 0

This used to have problems with older CherryPy versions, but the
current one seems to handle it just fine.

nilmdb/server/server.py

@@ -474,8 +474,7 @@ class Server(object):
         # Shutdowns normally wait for clients to disconnect.  To speed
         # up tests, set fast_shutdown = True
         if fast_shutdown:
-            # Setting timeout to 0 triggers os._exit(70) at shutdown, grr...
-            cherrypy.server.shutdown_timeout = 0.01
+            cherrypy.server.shutdown_timeout = 0
         else:
             cherrypy.server.shutdown_timeout = 5