RFR: 8376760: VerifyJimage.java#compare intermittent failed with fastdebug [v3]

[SendaoYan]

> Hi all,
> 
> Test tools/jimage/VerifyJimage.java#compare intermittent timed out with fastdebug build. I think it would be better to ajust the jtreg timeout factor(20*timeoutFactor) rather that set the fix timeout value(20) for awaitTermination.
> 
> The test run all passed 100 times simultaneously.

SendaoYan has updated the pull request incrementally with one additional commit since the last revision:

  Remove unnecessary import

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/29498/files
  - new: https://git.openjdk.org/jdk/pull/29498/files/4a0d1301..d3898845

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=29498&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=29498&range=01-02

  Stats: 1 line in 1 file changed: 0 ins; 1 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/29498.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/29498/head:pull/29498

PR: https://git.openjdk.org/jdk/pull/29498