RFR: 8200102: NativeLibraryTest.java fails intermittently, unloaded count is not same as expected

[Brent Christian]

On Fri, 4 Dec 2020 19:51:54 GMT, Mandy Chung <mchung at openjdk.org> wrote:

>> Please review this fix for the intermittently-failing java/lang/ClassLoader/nativeLibrary/NativeLibraryTest.java.
>> 
>> The change replaces System.gc()+sleep() with the more robust gcAwait() mechanic used elsewhere in the test base, [as pointed out by Martin](https://bugs.openjdk.java.net/browse/JDK-8200102?focusedCommentId=14382648&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14382648)(thanks!).
>> 
>> The new version of the test passes 100 times out of 100 on the test farm.
>
> Alternatively, you can simply use `test/libjdk/test/lib/util/ForceGC` in the testlibrary.

Yes, I think that's a better plan, Mandy.  Thanks.  I'll update the fix.

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PR: https://git.openjdk.java.net/jdk/pull/1630