RFR: 8268424: JFR tests fail due to GC cause 'G1 Preventive Collection' not in the valid causes after JDK-8257774

[Jie Fu]

On Wed, 9 Jun 2021 02:18:05 GMT, David Holmes <dholmes at openjdk.org> wrote:

> Hi Jie,
> 
> This looks good and trivial IMO.
> 
> Thanks for fixing it!
> 
> David

Thanks @dholmes-ora .

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PR: https://git.openjdk.java.net/jdk/pull/4422