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
9a66ca7c79fab293c1bb0534e0d208c7e4f58b01 jdk7-b24
58039502942e52f4144a33f36290a2bd2f3581e6 jdk7-b25
c46d25a2350ac147d0121d9c9725af6fcb1b4dbe jdk7-b26
a17265993253d61becd04fe7d96d1fe8b4bd6dff jdk7-b27
4ef4bd31856949554967fbf22783babb21a62a0e jdk7-b28