RFR [8011537]: (fs) Path.register(..) clears interrupt status of thread with no InterruptedException

[Ivan Gerasimov]

Hello!

The interrupted status of a thread gets cleared with a call to 
Path.register().
This is due to call to Object.wait().

Below is the fix with an updated regtest.
Would you please help review it?

BUGURL: https://bugs.openjdk.java.net/browse/JDK-8011537
WEBREV: http://cr.openjdk.java.net/~igerasim/8011537/0/webrev/

Sincerely yours,
Ivan