[jdk11u-dev] RFR: 8278065: Refactor subclassAudits to use ClassValue

[Roman Kennke]

On Wed, 16 Mar 2022 14:33:43 GMT, Roman Kennke <rkennke at openjdk.org> wrote:

> This backports the fix for JDK-8278065, which fixes a number of small issues with the preceding change for JDK-8277072.
> The original change has baked for several weeks in jdk19 and applies with some conflicts caused by different context.
> 
> Testing:
>  - [x] tier1
>  - [x] tier2
>  - [x] tier3

@RogerRiggs @plevart If you find some time, could you please review this backport? Thank you!

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PR: https://git.openjdk.java.net/jdk11u-dev/pull/899