[jdk11u-dev] RFR: 8159904: [TEST_BUG] Failure on solaris of java/awt/Window/MultiWindowApp/MultiWindowAppTest.java

[Goetz Lindenmaier]

I backport this for parity with 11.0.14-oracle.

Clean except for ProblemList: test was not problem listed.

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Commit messages:
 - Backport 6ce52e62770c5e1933cbe26bb18b47d6099e4a70

Changes: https://git.openjdk.java.net/jdk11u-dev/pull/469/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=469&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8159904
  Stats: 7 lines in 1 file changed: 2 ins; 0 del; 5 mod
  Patch: https://git.openjdk.java.net/jdk11u-dev/pull/469.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk11u-dev pull/469/head:pull/469

PR: https://git.openjdk.java.net/jdk11u-dev/pull/469