Review for 6886108

[Michael McMahon]

Can I get the following test case change reviewed?

http://cr.openjdk.java.net/~michaelm/6886108/webrev.01/

The problem is a test case binding to a fixed port number
which fails randomly, if the port is in use. The test needs to
reuse the same port number itself, but it just remembers the
one that was assigned the first time.

The change also includes a NPE fix to the old test Http server framework.

Thanks,
Michael.