[jdk17u-dev] RFR: 8297424: java/net/httpclient/AsyncExecutorShutdown.java fails in AssertionError due to misplaced assert

[Goetz Lindenmaier]

I backport this to make later changes clean.

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Commit messages:
 - Backport 5d2772a43ef6409bf556cefb4eb4242594451674

Changes: https://git.openjdk.org/jdk17u-dev/pull/3684/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=3684&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8297424
  Stats: 10 lines in 2 files changed: 3 ins; 4 del; 3 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/3684.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/3684/head:pull/3684

PR: https://git.openjdk.org/jdk17u-dev/pull/3684