websocket: fix socket leak in test
websocket: fix socket leak in test

Possibly fixes issue 1694.

R=bradfitzgo
CC=golang-dev
http://codereview.appspot.com/4427049

Committer: Brad Fitzpatrick <ae9783c0b0efc69cd85ab025ddd17aa44cdc4aa5@golang.org>
abustany/go,abustany/go,abustany/go,abustany/go,abustany/go,abustany/go,abustany/go