[8u] RFR: 8167615: Opensource unit/regression tests for JavaSound

[Roland Westrelin]

The patch applies cleanly but I had to change the path to a couple test
files:
test/javax/sound/midi/MidiSystem/testdata/conf/sound.properties to test/javax/sound/midi/MidiSystem/testdata/lib/conf/sound.properties
test/javax/sound/sampled/AudioSystem/testdata/conf/sound.properties to test/javax/sound/sampled/AudioSystem/testdata/lib/conf/sound.properties

so it the library code in 8u finds those files where it expects them.

For the record, the webrev:
http://cr.openjdk.java.net/~roland/8167615.8u/webrev.00/

Initial change:
https://bugs.openjdk.java.net/browse/JDK-8167615
http://hg.openjdk.java.net/jdk9/jdk9/jdk/rev/5445b9413d9d

I ran the entire javax/sound test suite and I see a few failures that I
can either reproduce with 11u or are part of the problem list.

Roland.