[lworld] RFR: 8369567: [lworld] Set jtreg timeout factor to 4

[Paul Hübner]

Hi all,

To address many timeouts in the tests, we temporarily reset the timeout factor to 4 as mainline is doing.

Testing: tiers 1-3.

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Commit messages:
 - Set timeout factor to 4.

Changes: https://git.openjdk.org/valhalla/pull/1674/files
  Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=1674&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8369567
  Stats: 3 lines in 3 files changed: 0 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/valhalla/pull/1674.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/1674/head:pull/1674

PR: https://git.openjdk.org/valhalla/pull/1674