RFR (testbug) 8218133: sun/net/www/protocol/http/ProtocolRedirect.java failed with "java.net.ConnectException"

[Daniel Fuchs]

8218133: sun/net/www/protocol/http/ProtocolRedirect.java failed
          with "java.net.ConnectException"
https://bugs.openjdk.java.net/browse/JDK-8218133

webrev:
http://cr.openjdk.java.net/~dfuchs/webrev_8218133/webrev.00/

Connection refused are usually a symptom of port reuse
issue, and using the loopback interface reduces the
risk of this happening.

The test was also missing some cleanup.

best regards,

-- daniel