RFR: 8288471: java/awt/ScrollPane/bug8077409Test.java is unstable and fails intermittently in CI [v3]

[Manukumar V S]

> java/awt/ScrollPane/bug8077409Test.java is unstable and fails intermittently in CI, especially in MacOS machines.
> Also the frame created in this test is not disposed which may interfere with other tests.
> 
> Fix:
> Some stabilisations added and the frame is disposed properly.
> 
> Testing:
> Tested 100 times per platform(macosx-x64,macosx-aarch64,windows-x64,linux-x64) and got all PASS.

Manukumar V S has updated the pull request incrementally with one additional commit since the last revision:

  Review comments fixed : Code reformatting, changed the indentation to the standard four-space indentation

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/24292/files
  - new: https://git.openjdk.org/jdk/pull/24292/files/aa029a4f..0af15c59

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=24292&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=24292&range=01-02

  Stats: 116 lines in 1 file changed: 37 ins; 37 del; 42 mod
  Patch: https://git.openjdk.org/jdk/pull/24292.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/24292/head:pull/24292

PR: https://git.openjdk.org/jdk/pull/24292