RFR: 8202932: java/awt/Component/NativeInLightShow/NativeInLightShow.java fails

[Alexander Zvegintsev]

Looks like the test does not fail anymore.

However some cleanup was made:

- fixed wildcard imports
- frame centered and explicitly disposed at the end
- removed unused `setAutoDelay()` call (no key/mouse key events generated)
- improved variable naming

Testing still green.

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Commit messages:
 - initial

Changes: https://git.openjdk.java.net/jdk/pull/6056/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=6056&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8202932
  Stats: 54 lines in 2 files changed: 17 ins; 19 del; 18 mod
  Patch: https://git.openjdk.java.net/jdk/pull/6056.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/6056/head:pull/6056

PR: https://git.openjdk.java.net/jdk/pull/6056