RFR: 8314828: Mark 3 jcmd command-line options test as vm.flagless

[Leonid Mesnik]

On Wed, 23 Aug 2023 22:58:05 GMT, Leonid Mesnik <lmesnik at openjdk.org> wrote:

> Mark 3 tests as flagless to don't run them if not needed. Also, small clean up.

these 3 tests  verifies command-line options only like help, version, invalid versions. I don't think they any value by runnign with different flags. But  If you think it makes sense just to start process with vm flags, I am fine to fix them.

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PR Comment: https://git.openjdk.org/jdk/pull/15407#issuecomment-1703324895