[jdk11u-dev] RFR: 8300205: Swing test bug8078268 make latch timeout configurable

[Matthias Baesken]

8300205: Swing test bug8078268 make latch timeout configurable

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Commit messages:
 - Backport e82dc6935b5f575a53fcba9c96767cee1b535cb8

Changes: https://git.openjdk.org/jdk11u-dev/pull/1812/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=1812&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8300205
  Stats: 4 lines in 1 file changed: 1 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/1812.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev pull/1812/head:pull/1812

PR: https://git.openjdk.org/jdk11u-dev/pull/1812