RFR: 8266193: BasicJMapTest should include testHistoParallel methods [v2]

[BuddyLiao]

On Wed, 5 May 2021 08:58:15 GMT, Serguei Spitsyn <sspitsyn at openjdk.org> wrote:

> @buddyliao
> The test update looks good to me.
> Thanks,
> Serguei

@sspitsyn Thanks, I force update the title to match between PR and JBS.
Would you help me to push it?

Thanks,
Buddy

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PR: https://git.openjdk.java.net/jdk/pull/3810