JDK 10 RFR of JDK-8182376: Refactor shell test Refactor shell test java/nio/file/Path/MacPathTest.sh to java

[Amy Lu]

java/nio/file/Path/MacPathTest.sh

Please review this patch to refactor the shell test to java.

bug: https://bugs.openjdk.java.net/browse/JDK-8182376
webrev: http://cr.openjdk.java.net/~amlu/8182376/webrev.00/

Thanks,
Amy