RFR: JDK-8195809: [TESTBUG] jps and jcmd -l support for containers is not tested [v3]

[Mikhailo Seledtsov]

On Fri, 10 Sep 2021 21:18:23 GMT, Mikhailo Seledtsov <mseledtsov at openjdk.org> wrote:

>> Please review this addition of new testing:
>>   - new test for sending jcmd commands across container boundaries
>>   - updated existing sidecar test, enabling jcmd test case
>
> Mikhailo Seledtsov has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Removed unnecessary UsePerfData per review feedback

Harold, Kevin, thank you for review.

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PR: https://git.openjdk.java.net/jdk/pull/5368