[jdk11u-dev] RFR: 8231585: java/lang/management/ThreadMXBean/MaxDepthForThreadInfoTest.java fails with java.lang.NullPointerException

[Amos Shi]

Backport of [JDK-8231585](https://bugs.openjdk.org/browse/JDK-8231585)
- Clean Backport
- Test Succeeded in local Dev Apple M1 Laptop

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Commit messages:
 - Backport db8757ad1255929a63a4037fd7fa9a7b47fd4fc7

Changes: https://git.openjdk.org/jdk11u-dev/pull/2357/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=2357&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8231585
  Stats: 3 lines in 1 file changed: 0 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/2357.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/2357/head:pull/2357

PR: https://git.openjdk.org/jdk11u-dev/pull/2357