RFR: 8367795: HeadlessMalfunctionTest may fail due to timeout

[Phil Race]

On Fri, 19 Sep 2025 18:20:43 GMT, Sergey Bylokhov <serb at openjdk.org> wrote:

> The default timeout factor for tests was changed by [JDK-8260555](https://bugs.openjdk.org/browse/JDK-8260555). Since then, the HeadlessMalfunctionTest may occasionally fail on some systems when run in parallel with other tests. When executed alone, it usually completes in 30–40 seconds, but under CPU spikes it can take up to ~120 seconds, which can occasionally cause it to fail.

Marked as reviewed by prr (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/27397#pullrequestreview-3274242614