hg: valhalla/valhalla: [nestmates] Add instrumentation tests for hidden classes.

[mandy.chung at oracle.com]

Changeset: 711da7dc077d
Author:    sspitsyn
Date:      2020-02-28 12:16 -0800
URL:       https://hg.openjdk.java.net/valhalla/valhalla/rev/711da7dc077d

[nestmates] Add instrumentation tests for hidden classes.

+ test/jdk/java/lang/instrument/HiddenClass/HiddenClassAgent.java
+ test/jdk/java/lang/instrument/HiddenClass/HiddenClassApp.java
+ test/jdk/java/lang/instrument/HiddenClass/hidden/HiddenClass.java