RFR: 8317834: java/lang/Thread/IsAlive.java timed out

Tue Nov 14 16:47:37 UTC 2023

Currently the `IsAlive` test occasionally times out.

This PR changes the timeout from `10` to `25` which I think is an adequate increase based on the failures I've seen. Though I'd be happy to change it to another value if someone thinks `25` isn't ideal.

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Commit messages:
 - bumped timeout from 10 to 25

Changes: https://git.openjdk.org/jdk/pull/16659/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=16659&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8317834
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/16659.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/16659/head:pull/16659

PR: https://git.openjdk.org/jdk/pull/16659