RFR: 8368500: ContextClassLoader cannot be reset on threads in ForkJoinPool.commonPool() [v3]

[Viktor Klang]

On Wed, 8 Oct 2025 06:58:40 GMT, Johny Jose <duke at openjdk.org> wrote:

>> The permanent disabling of the Security Manager in JDK 24  allow setCCL to set the CCL to a custom class loader. However, it doesn't allow it to be set to a custom class loader and then "reset" back to the system class loader before executing further code in the task. The changes are made to relax the restriction in setCCL to reset back to system class loader
>
> Johny Jose has updated the pull request incrementally with one additional commit since the last revision:
> 
>   cleanup changes for test case

Changes requested by vklang (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/27648#pullrequestreview-3310753662