[jdk11u-dev] RFR: 8178698: javax/sound/midi/Sequencer/MetaCallback.java failed with timeout

[Victor Rudometov]

Backport for [JDK-8178698](https://bugs.openjdk.org/browse/JDK-8178698) javax/sound/midi/Sequencer/MetaCallback.java failed with timeout https://github.com/openjdk/jdk/commit/43ce047f9f417a1d8afa83a3d2c2429a478975db

Clean backport
Test update, low risk.
Test passes on mac & linux using make run-test TEST="test/jdk/javax/sound/midi/Sequencer/MetaCallback.java"

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Commit messages:
 - Backport 43ce047f9f417a1d8afa83a3d2c2429a478975db

Changes: https://git.openjdk.org/jdk11u-dev/pull/1534/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=1534&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8178698
  Stats: 29 lines in 2 files changed: 22 ins; 1 del; 6 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/1534.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev pull/1534/head:pull/1534

PR: https://git.openjdk.org/jdk11u-dev/pull/1534