Fix missing decorator for tun_setup handler

cloudcontrol/node/hypervisor/__init__.py

@@ -511,6 +511,7 @@ class Handler(HostHandler):
         return dict(id=job.id, log='', checksum=job.checksum)
 
     @threadless
+    @rpc_handler
     def tun_setup(self, local=True):
         """Set up local tunnel and listen on a random port.