THRIFT-3712 TTornadoServer cannot handle IPv6 address

This closes #924
diff --git a/lib/py/src/TTornado.py b/lib/py/src/TTornado.py
index e01a49f..5eff11d 100644
--- a/lib/py/src/TTornado.py
+++ b/lib/py/src/TTornado.py
@@ -164,7 +164,7 @@
 
     @gen.coroutine
     def handle_stream(self, stream, address):
-        host, port = address
+        host, port = address[:2]
         trans = TTornadoStreamTransport(host=host, port=port, stream=stream,
                                         io_loop=self.io_loop)
         oprot = self._oprot_factory.getProtocol(trans)