RFR: 8254102: use ProcessHandle::pid instead of ManagementFactory::getRuntimeMXBean to get pid in tests [v2]

[Aleksey Shipilev]

On Wed, 7 Oct 2020 18:09:28 GMT, Igor Ignatyev <iignatyev at openjdk.org> wrote:

>> Hi all,
>> 
>> could you please review this small cleanup which replaces
>> `ManagementFactory.getRuntimeMXBean().getName().split("@")[0]` w/ `ProcessHandle.current().pid()` to get current
>> process pid?  Thanks,
>> -- Igor
>
> Igor Ignatyev has updated the pull request incrementally with two additional commits since the last revision:
> 
>  - use Long.toString instead of String.valueOf
>  - remove explicit coversion to String in Suicide.java

Still looks good to me.

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Marked as reviewed by shade (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/534