RFR: 8271624: Avoid unnecessary ThreadGroup.checkAccess calls when creating Threads

[Roger Riggs]

On Mon, 2 Aug 2021 18:03:42 GMT, Claes Redestad <redestad at openjdk.org> wrote:

> Trivially avoid some redundant calls when creating threads. (ThreadGroup.checkAccess is final, and all it does is call security.checkAccess(g) if there's a SM installed)

LGTM

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Marked as reviewed by rriggs (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/4959