RFR 8043838, Test java/net/ServerSocket/AcceptCauseFileDescriptorLeak.java failed intermittently in nightly

[Felix Yang]

Hi all,

   please review the following patch to cover the codes from shell to 
plain java.

Bug:

    https://bugs.openjdk.java.net/browse/JDK-8043838

Webrev:

    http://cr.openjdk.java.net/~xiaofeya/8043838/webrev.00/

Thanks,

Felix