RFR: 8305427: Write a test Check whether focus changes as expected when requestFocus is used to traverse randomly around the window [v3]

[Ravi Gupta]

> This testcase Checking whether the Component becoming the Focus Owner and FocusEvent.FOCUS_GAINED will be received by the Component when the focus is requested on the component using requestFocus.
> 
> Testing:
> Tested using Mach5(20 times per platform) in macos,linux and windows and got all pass.

Ravi Gupta has updated the pull request incrementally with one additional commit since the last revision:

  8305427: Code modified to wait for FOCUS_GAINED event to perform.

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Changes:
  - all: https://git.openjdk.org/jdk/pull/13293/files
  - new: https://git.openjdk.org/jdk/pull/13293/files/1905d463..2f071815

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=13293&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=13293&range=01-02

  Stats: 37 lines in 1 file changed: 22 ins; 0 del; 15 mod
  Patch: https://git.openjdk.org/jdk/pull/13293.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/13293/head:pull/13293

PR: https://git.openjdk.org/jdk/pull/13293