RFR: 8277807: Increase default initial concurrent refinement threshold [v2]

[Kim Barrett]

On Tue, 30 Nov 2021 10:26:34 GMT, Stefan Johansson <sjohanss at openjdk.org> wrote:

>> Kim Barrett has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   update copyright
>
> Marked as reviewed by sjohanss (Reviewer).

Thanks @kstefanj and @tschatzl for reviews.

-------------

PR: https://git.openjdk.java.net/jdk/pull/6549