RFR: CODETOOLS-7903215: JMH: xperfasm throws incorrect error when xperf is not available [v2]

[XIACYBING]

On Wed, 22 Jun 2022 10:07:45 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> Ah, good find. Let's not rely on `Utils.tryWith` returning the `ArrayList`, because that would shun the messages on some failure paths. Instead, let's do this:
> 
> ```
>         Collection<String> errsStop = Utils.tryWith(path, "-stop");
>         if (!errsStop.isEmpty()) {
>             throw new ProfilerException(MSG_UNABLE_STOP + ": " + errsStop.toString());
>         }
> ```

This is indeed a better way, the code has been modified.

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PR: https://git.openjdk.org/jmh/pull/72