RFR: 8287596: Reorg jdk.test.lib.util.ForceGC [v2]

[Mandy Chung]

On Wed, 1 Jun 2022 21:07:16 GMT, Xue-Lei Andrew Fan <xuelei at openjdk.org> wrote:

>> This is a follow up update per comments in [JDK-8287384 PR](https://github.com/openjdk/jdk/pull/8907).  The tier1 and tier2 test in open part looks good to me.  Please help to run Mach5 just case the closed test cases are impacted.
>
> Xue-Lei Andrew Fan has updated the pull request incrementally with one additional commit since the last revision:
> 
>   back to wait 1 second

No, it doesn't work.  You can build a fastdebug build with `configure --enable-debug`.  I reproduce it on macOS.   If I restore to the previous version without 8287384, the test passes.

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PR: https://git.openjdk.java.net/jdk/pull/8979