8172842: Invoke lldb with --batch from failure handler
Reviewed-by: erikj, dsamersoff

8171366: macOS: Do not run failure handler commands that require Developer mode access
Reviewed-by: erikj, iignatyev

8168414: Various timeouthandler fixes
Reviewed-by: mlarsson

8168412: Reduce buffering in jtreg timeouthandler
Reviewed-by: mlarsson

8168409: Update list of tools run by the jtreg timeouthandler
Reviewed-by: mlarsson

8166262: failurehandler should not use jtreg internal API
Reviewed-by: sla, dsamersoff

Merge

8149777: Enable enhanced failure handler for "make test"
Reviewed-by: ihse

8149780: GatherProcessInfoTimeoutHandler shouldn't call getWin32Pid if the lib isn't load
Reviewed-by: iignatyev, stsmirno

8146287: typos in /test/failure_handler
Reviewed-by: iignatyev, stsmirno

8132961: JEP 279: Improve Test-Failure Troubleshooting
Reviewed-by: lmesnik, sla
Contributed-by: kirill.shirokov@oracle.com, dmitry.fazunenko@oracle.com, kirill.zhaldybin@oracle.com, igor.ignatyev@oracle.com