[jdk11u-dev] RFR: 8217882: java/net/httpclient/MaxStreams.java failed once

[Goetz Lindenmaier]

I downport this for parity with 11.0.13-oracle.

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Commit messages:
 - Backport 6dcfd0f93a05df49ae27be28ce9529ae5cbe2c7a

Changes: https://git.openjdk.java.net/jdk11u-dev/pull/380/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=380&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8217882
  Stats: 13 lines in 1 file changed: 7 ins; 0 del; 6 mod
  Patch: https://git.openjdk.java.net/jdk11u-dev/pull/380.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk11u-dev pull/380/head:pull/380

PR: https://git.openjdk.java.net/jdk11u-dev/pull/380