[jdk13u-dev] RFR: 8240711: TestJstatdPort.java failed due to "ExportException: Port already in use:"

[Olga Mikhaltsova]

I'd like to backport JDK-8240711 to jdk13u for parity with jdk11u.
The original patch applied cleanly.
sun/tools/jstatd tests passed.

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Commit messages:
 - Backport b70ef0d2e256085b48f8d5b0f131bca89b699609

Changes: https://git.openjdk.java.net/jdk13u-dev/pull/141/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk13u-dev&pr=141&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8240711
  Stats: 20 lines in 1 file changed: 7 ins; 10 del; 3 mod
  Patch: https://git.openjdk.java.net/jdk13u-dev/pull/141.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk13u-dev pull/141/head:pull/141

PR: https://git.openjdk.java.net/jdk13u-dev/pull/141