Integrated: 8308716: ProblemList java/util/concurrent/ScheduledThreadPoolExecutor/BasicCancelTest.java with genzgc on windows-x64

[Daniel D. Daugherty]

Trivial fixes to ProblemList some tests:
[JDK-8308716](https://bugs.openjdk.org/browse/JDK-8308716) ProblemList java/util/concurrent/ScheduledThreadPoolExecutor/BasicCancelTest.java with genzgc on windows-x64
[JDK-8308718](https://bugs.openjdk.org/browse/JDK-8308718) ProblemList three mlvm/indy/func/jvmti tests on windows-x64 in Xcomp mode
[JDK-8308720](https://bugs.openjdk.org/browse/JDK-8308720) ProblemList java/awt/event/SequencedEvent/MultipleContextsFunctionalTest.java on macosx-x64

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Commit messages:
 - 8308720: ProblemList java/awt/event/SequencedEvent/MultipleContextsFunctionalTest.java on macosx-x64
 - 8308718: ProblemList three mlvm/indy/func/jvmti tests on windows-x64 in Xcomp mode
 - 8308716: ProblemList java/util/concurrent/ScheduledThreadPoolExecutor/BasicCancelTest.java with genzgc on windows-x64

Changes: https://git.openjdk.org/jdk/pull/14106/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=14106&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8308716
  Stats: 6 lines in 3 files changed: 6 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/14106.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/14106/head:pull/14106

PR: https://git.openjdk.org/jdk/pull/14106