RFR: 8341637: java/net/Socket/UdpSocket.java fails with "java.net.BindException: Address already in use" (macos-aarch64)

[Daniel Fuchs]

UdpSocket has been observed failing again in the CI.
[JDK-8265362](https://bugs.openjdk.org/browse/JDK-8265362) added a retry-once policy. 
This fix proposes to retry once more, and adds a bit of delay between retries.

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Commit messages:
 - Fix error message
 - 8341637:java/net/Socket/UdpSocket.java fails with "java.net.BindException: Address already in use" (macos-aarch64)

Changes: https://git.openjdk.org/jdk/pull/21388/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=21388&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8341637
  Stats: 17 lines in 1 file changed: 7 ins; 0 del; 10 mod
  Patch: https://git.openjdk.org/jdk/pull/21388.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21388/head:pull/21388

PR: https://git.openjdk.org/jdk/pull/21388