[jdk17u-dev] RFR: 8208565: [TEST_BUG] javax\swing\PopupFactory\6276087\NonOpaquePopupMenuTest.java throws NPE

[Goetz Lindenmaier]

I backport this for parity with 17.0.15-oracle.

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Commit messages:
 - Backport 72f82dd723bf1c048d140238154580db434706e2

Changes: https://git.openjdk.org/jdk17u-dev/pull/3201/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=3201&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8208565
  Stats: 84 lines in 2 files changed: 27 ins; 30 del; 27 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/3201.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/3201/head:pull/3201

PR: https://git.openjdk.org/jdk17u-dev/pull/3201