[jdk11u-dev] RFR: 8198617: java/awt/Focus/6382144/EndlessLoopTest.java fails on mac

[Christoph Langer]

Backport of JDK-8198617.

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Commit messages:
 - Backport ce48f04085817f09535647ed6fd66849916ff56e

Changes: https://git.openjdk.java.net/jdk11u-dev/pull/595/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=595&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8198617
  Stats: 111 lines in 2 files changed: 47 ins; 36 del; 28 mod
  Patch: https://git.openjdk.java.net/jdk11u-dev/pull/595.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk11u-dev pull/595/head:pull/595

PR: https://git.openjdk.java.net/jdk11u-dev/pull/595