RFR: 8346324: javax/swing/JScrollBar/4865918/bug4865918.java fails in CI [v4]

[Prasanta Sadhukhan]

> javax/swing/JScrollBar/4865918/bug4865918.java fails in CI citing
> 
> java.lang.RuntimeException: The scrollbar block increment is incorrect
> at bug4865918.main(bug4865918.java:60) 
> 
> Seems like scrollbar is not in focus when mouse is pressed..Used CountDownLatch to mage focus gain more determinisitic.
> Fix is passing in CI in several CI systems

Prasanta Sadhukhan has updated the pull request incrementally with one additional commit since the last revision:

  throw excpn

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/22783/files
  - new: https://git.openjdk.org/jdk/pull/22783/files/2eb13c95..92c09afe

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=22783&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=22783&range=02-03

  Stats: 3 lines in 1 file changed: 2 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/22783.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/22783/head:pull/22783

PR: https://git.openjdk.org/jdk/pull/22783