[jdk11u-dev] RFR: 8217903: java/net/httpclient/Response204.java fails with 404

[Goetz Lindenmaier]

I am downporting this for parity with 11.0.13-oracle.
I had to do trivial resolves due to conflicts. Test passes.

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Commit messages:
 - Backport 6b64f80be4eb2c4bd0317b0a011b54ebb149252f

Changes: https://git.openjdk.java.net/jdk11u-dev/pull/379/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=379&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8217903
  Stats: 6 lines in 1 file changed: 3 ins; 0 del; 3 mod
  Patch: https://git.openjdk.java.net/jdk11u-dev/pull/379.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk11u-dev pull/379/head:pull/379

PR: https://git.openjdk.java.net/jdk11u-dev/pull/379