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

[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.

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Commit messages:
 - 8305427: Whitespace removed
 - 8305427: Write a test Check whether focus changes as expected when requestFocus is used to traverse randomly around the window

Changes: https://git.openjdk.org/jdk/pull/13293/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=13293&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8305427
  Stats: 232 lines in 1 file changed: 232 ins; 0 del; 0 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