[jdk11u-dev] RFR: 8231037: java/net/InetAddress/ptr/Lookup.java fails intermittently due to reverse lookup failed

[Goetz Lindenmaier]

I backport this for parity with 11.0.20-oracle.

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Commit messages:
 - Backport 8578ab1c235e07f436aa095a8a03c6abf8378cd3

Changes: https://git.openjdk.org/jdk11u-dev/pull/1955/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=1955&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8231037
  Stats: 71 lines in 1 file changed: 51 ins; 1 del; 19 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/1955.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/1955/head:pull/1955

PR: https://git.openjdk.org/jdk11u-dev/pull/1955