Test update to make failures such as JDK-8076494 more informative. Waiting for a thread to change state: give more time (to distinguish a real deadlock from some other delay), and log the thread stackframes when the expected state change is not observed.
------------- Commit messages: - import tweak - 8302870: More information needed from failures in vmTestbase ThreadUtils.waitThreadState Changes: https://git.openjdk.org/jdk/pull/12661/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=12661&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8302870 Stats: 28 lines in 1 file changed: 23 ins; 0 del; 5 mod Patch: https://git.openjdk.org/jdk/pull/12661.diff Fetch: git fetch https://git.openjdk.org/jdk pull/12661/head:pull/12661 PR: https://git.openjdk.org/jdk/pull/12661
