RFR: 8376151: Test javax/swing/JFileChooser/4966171/bug4966171.java is failing with OOME

[Damon Nguyen]

This failing test has been untouched for years and has recently started failing with OOME. In addition, the test is failing pretty frequently and causing a lot of noise. It failed on multiple different machines as well. 

There seems to be a lot of byte arrays that looks like is causing the issue. To increase stability, I have gone ahead and reduced the `endTime` duration from 10 seconds to 5 seconds, which should be enough.

I have run the test on all OS's with 100 repeats after the changes and the test passed on all runs.

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Commit messages:
 - Initial commit

Changes: https://git.openjdk.org/jdk/pull/29395/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=29395&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8376151
  Stats: 3 lines in 1 file changed: 0 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/29395.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/29395/head:pull/29395

PR: https://git.openjdk.org/jdk/pull/29395