RFR: 8288415: java/awt/PopupMenu/PopupMenuLocation.java is unstable in MacOS machines

[Manukumar V S]

java/awt/PopupMenu/PopupMenuLocation.java seems to be unstable in MacOS machines, especially in MacOSX 12 machines. It seems to be a testbug as adding some stability improvements fix the issue. It intermittently fails in CI causing some noise. This test was already problem listed in windows due to an umbrella bug JDK-8238720. I have removed the problem listing and tested it in windows platform also, it works fine there.

Fix:
Some stability improvements have been done and the test has been run 100 times per platform in mach5 and got full PASS.

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Commit messages:
 - 8288415: java/awt/PopupMenu/PopupMenuLocation.java is unstable in MacOS machines

Changes: https://git.openjdk.org/jdk/pull/9187/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=9187&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8288415
  Stats: 22 lines in 2 files changed: 10 ins; 2 del; 10 mod
  Patch: https://git.openjdk.org/jdk/pull/9187.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/9187/head:pull/9187

PR: https://git.openjdk.org/jdk/pull/9187