RFR: 8071: Cleanup after latest refactorings [v2]

[Alex Macdonald]

On Wed, 24 May 2023 07:56:32 GMT, Christoph Langer <clanger at openjdk.org> wrote:

>> After JMC-7308, test JVMCommandLineToolkitTest.java should move into core/common.
>> Also, there are some Javadoc related warnings during core build which should be fixed.
>
> Christoph Langer has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Spotless

Marked as reviewed by aptmac (Reviewer).

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PR Review: https://git.openjdk.org/jmc/pull/485#pullrequestreview-1441794490