RFR: 8343754: Problemlist jdk/jfr/event/oldobject/TestShenandoah.java after JDK-8279016

[Erik Gahlin]

On Thu, 7 Nov 2024 10:46:06 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> See comment in [JDK-8279016](https://bugs.openjdk.org/browse/JDK-8279016). I overlooked the case when we just run with Shenandoah without explicitly specifying -XX:+UseShenandoahGC. The test should be disabled in that mode as well.
> 
> Additional testing:
>  - [x] Affected test is now skipped
>  - [x] `jdk_jfr` out of the box, now passes
>  - [x] `jdk_jfr` with `-XX:+UseShenandoahGC`, still passes

Marked as reviewed by egahlin (Reviewer).

-------------

PR Review: https://git.openjdk.org/jdk/pull/21947#pullrequestreview-2421844510