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

[Harold Seigel]

On Sat, 4 Sep 2021 00:03:14 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

test/hotspot/jtreg/containers/docker/TestJcmd.java line 94:

> 92: 
> 93: 
> 94:     // Run "jcmd -l" in a sidecar container, find the target process.

Since 'jcmd -l' is not run in a sidecar, this comment is incorrect.

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