This test has been getting occasional timeouts on the race builder.
The point of the test is whether a file descriptor leaks, not whether
the connection occurs in a certain amount of time. So use a very large
timeout. The connection is normally fast and the timeout doesn't matter.

Updates #13324

Change-Id: Ie1051c4a0be1fca4e63b1277101770be0cdae512
Reviewed-on: https://go-review.googlesource.com/82916
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>