Please review the change that fix the JDI test when running with Graal. The problem here is that the test verifies that a class prepare event is generated when the target VM loads a specific test class, but with Graal turned on additional class prepare events are generated by the compiler threads. The test doesn't expect them and fails. The fix ensures that additional class prepare events are ignored by the test and properly handled.
Bug: https://bugs.openjdk.java.net/browse/JDK-8204695 Webrev: http://cr.openjdk.java.net/~dtitov/8204695/webrev.01/ Thanks! --Daniil
