8156002: java/nio/channels/SocketChannel/AdaptSocket.java Fails in Mesos on OSX
Reviewed-by: dfuchs

8037360: java/nio/channels/SocketChannel/Connect.java fails intermittently
Reviewed-by: alanb
Contributed-by: huaming.li@oracle.com

6720349: (ch) Channels tests depending on hosts inside Sun
Summary: This changeset make the nio tests start small TCP or UDP servers from within the tests, instead of relying on external services.
Reviewed-by: alanb