[7u6] Request for approval: 7176630, 7177617 : (sc) SocketChannel.write does not write more than 128k when channel configured blocking [win]

[Seán Coffey]

requesting to backport Alan's changes for this fix (& testcase update) 
from jdk8 to 7u6.

7176630: (sc) SocketChannel.write does not write more than 128k when 
channel configured blocking [win]
JDK 8 changeset : http://hg.openjdk.java.net/jdk8/tl/jdk/rev/4f99d146fce0

7177617: TEST_BUG: java/nio/channels/AsyncCloseAndInterrupt.java failing 
(win)
JDK 8 changeset : http://hg.openjdk.java.net/jdk8/tl/jdk/rev/689129c71ccd

regards,
Sean.