RFR: 8288471: java/awt/ScrollPane/bug8077409Test.java is unstable and fails intermittently in CI [v2]

[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 : Formatting changes

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/24292/files
  - new: https://git.openjdk.org/jdk/pull/24292/files/b060af3c..aa029a4f

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=24292&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=24292&range=00-01

  Stats: 10 lines in 1 file changed: 0 ins; 0 del; 10 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