RFR: 8269235: serviceability/sa/ClhsdbJstackXcompStress.java timed out

[Chris Plummer]

The test uses the default timeout, which is 2 minutes. The timeoutfactor being used ix 4x, so this gives 8 minutes or 480 seconds. This is why we see:

 Timeout refired 480 times

When this happens, usually the test takes a little over 10 minutes to complete (and pass). However, the most recent failure says:

 elapsed time (seconds): 764.054

So this is nearly 13 minutes. I'm going to give the test 20 minutes (when timeoutfactor 4x is used), so this translate to specifying a timeout of 5 minutes (300 seconds).

-------------

Commit messages:
 - Increase test timeout

Changes: https://git.openjdk.org/jdk/pull/10876/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=10876&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8269235
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/10876.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/10876/head:pull/10876

PR: https://git.openjdk.org/jdk/pull/10876