Have MockConn output closing handshake string to complete closing handshake in test_transfer_data. Review URL: http://codereview.appspot.com/4552063
Have MockConn output closing handshake string to complete closing handshake in test_transfer_data.
Review URL: http://codereview.appspot.com/4552063

git-svn-id: a751b5b3dcfba0ee4592a85c40d2fdd063ca0d53@483 4ff78f4a-9131-11de-b045-6380ec9940d4

XiaonuoGantan/pywebsocket,XiaonuoGantan/pywebsocket