RFR: 8151594: Move concurrent refinement thread activation logging out of GC pause

[Kim Barrett]

On Thu, 25 Nov 2021 19:24:45 GMT, Thomas Schatzl <tschatzl at openjdk.org> wrote:

>> Please review this move of the thread activation logging by concurrent
>> refinment threads to be within the suspendible thread set context, rather
>> than before it.  This prevents the logging for the thread activation
>> sometimes being intermixed with GC pause-time logging.
>> 
>> Testing:
>> mach5 tier1
>
> Lgtm.

Thanks @tschatzl and @albertnetymk for reviews.

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PR: https://git.openjdk.java.net/jdk/pull/6551