RFR: JDK-8353486 : Open source Swing Tests - Set 4

[Harshitha Onkar]

Open-sourced the following Swing tests:

1. javax/swing/JFileChooser/bug4464774.java
2. javax/swing/JFileChooser/bug4522756.java
3. javax/swing/JFileChooser/bug4759934.java
4. javax/swing/JFileChooser/bug4943900.java
5. javax/swing/JOptionPane/bug4194862.java

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Commit messages:
 - Swing tests Set4

Changes: https://git.openjdk.org/jdk/pull/24456/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=24456&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8353486
  Stats: 508 lines in 5 files changed: 508 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/24456.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/24456/head:pull/24456

PR: https://git.openjdk.org/jdk/pull/24456