6541641: (fc) java/nio/channels/FileChannel/ExpandingMap.java should clean up after itself
Summary: Close channel and explicitly de-ref the mapped buffers before exit.
Reviewed-by: alanb
1cc8dd79fd1cd13d36b385196271a29632c67c3b jdk7-b24
bf2517e15f0c0f950e5b3143c4ca11e2df73dcc1 jdk7-b25
5ae7db536e3fcf6be78e45b240a9058095e0ed38 jdk7-b26
67052ac87fc927d048e62ec54ff42adb230d3f7c jdk7-b27
18dc4ba4739a537fd146f77da51db16efce28da2 jdk7-b28