RFR: 7008: Agent should properly support Class and Thread [v2]

[Joshua Matsuoka]

On Sun, 10 Jan 2021 18:15:12 GMT, Marcus Hirt <hirt at openjdk.org> wrote:

>> Also fixes various issues and tests.
>
> Marcus Hirt has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Removing temporary workaround

Looks good to me.

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Marked as reviewed by jmatsuoka (Committer).

PR: https://git.openjdk.java.net/jmc/pull/192