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

Mon Jun 6 20:38:22 UTC 2022

On Wed, 1 Jun 2022 21:09:15 GMT, Mandy Chung <mchung at openjdk.org> wrote:

>> 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.

Inspired by @mlchung (See https://github.com/openjdk/jdk/pull/9021), use less waiting time for  UnloadingTest and re-open this PR.

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