RFR: 8317347: Parallel: Make TestInitialTenuringThreshold use createTestJvm

[Ivan Walulya]

On Mon, 2 Oct 2023 11:48:18 GMT, Leo Korinth <lkorinth at openjdk.org> wrote:

> Also add parallel flag for first invocation (this is a bug). Initial testing ok, but will run tiers before pushing.

Marked as reviewed by iwalulya (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/16009#pullrequestreview-1661707800