RFR: 8327757: Convert javax/swing/JSlider/6524424/bug6524424.java applet to main

[Prasanta Sadhukhan]

Conversion of manual applet test to main based using PassFailJFrame manual framework

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Commit messages:
 - Fix
 - 8327757: Convert javax/swing/JSlider/6524424/bug6524424.java applet to main

Changes: https://git.openjdk.org/jdk/pull/18263/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=18263&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8327757
  Stats: 256 lines in 3 files changed: 121 ins; 135 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/18263.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18263/head:pull/18263

PR: https://git.openjdk.org/jdk/pull/18263