RFR: 8204236: JFR unit test of thread CPU load should be enabled

[Robin Westberg]

Hi all,

Please review the following test case fix that enabled the JFR unit tests for the thread CPU load functionality. These tests were disabled during the open source work.

Issue: https://bugs.openjdk.java.net/browse/JDK-8204236 <https://bugs.openjdk.java.net/browse/JDK-8204236>
Webrev: http://cr.openjdk.java.net/~rwestberg/8204236/webrev.00/ <http://cr.openjdk.java.net/~rwestberg/8204236/webrev.00/>
Testing: hs-tier1

Best regards,
Robin