RFR: 8165675: Trace event for thread park has incorrect unit for timeout

[Erik Gahlin]

Hi,

Could I have a fix of a bug in the ThreadPark event.

The field "timeout" was incorrectly used for both 
LockSupport.parkNanos(nanos) and LockSupport.parkUntil(epochMillis). Fix 
is to use two fields, "timeout" and "until", with different content 
types. I also improved the unit test so it verifies the contents of the 
fields. To make it work,  I also had to update test framework and the 
print command of the jfr tool to handle missing values.

For some reason, the test TestEnoughPermission started to fail because 
it tried to access a class in a restricted package 
(sun.util.locale.provider). Fix was to not use String.format in the 
test. Not sure why it happened, but perhaps due to class initialization 
now happening in a different order.

Bug:
https://bugs.openjdk.java.net/browse/JDK-8165675

Webrev:
http://cr.openjdk.java.net/~egahlin/8165675/

Thanks
Erik