[8u] RFR 8178403: DirectAudio in JavaSound may hang and leak

[Zhengyu Gu]

I would like to backport this patch to 8u for parity with Oracle 8u301

The original bug: https://bugs.openjdk.java.net/browse/JDK-8178403
The original patch: 
http://hg.openjdk.java.net/jdk10/jdk10/jdk/rev/5fcac4064fdd

The original patch does not apply cleanly.

1. DirectAudioDevice.java has newer copyright year in 8u.
2. ClipCloseLoss.java does not in 8u's ProblemList.txt
3. ClipCloseLoss.java test does not have  "@key intermittent" line in
    8u.

8u webrev: http://cr.openjdk.java.net/~zgu/JDK-8178403-8u/webrev.00/

Test:
   passed ClipCloseLoss.java test

Thanks,

-Zhengyu