[jdk17u-dev] RFR: 8333765: [17u] Six sun/tools/jstatd testcases fail after JDK-8233725

[SendaoYan]

Hi all,
  The below 6 sun/tools/jstatd testcases fail after [JDK-8233725](https://bugs.openjdk.org/browse/JDK-8233725):

sun/tools/jstatd/TestJstatdExternalRegistry.java
sun/tools/jstatd/TestJstatdPort.java
sun/tools/jstatd/TestJstatdPortAndServer.java
sun/tools/jstatd/TestJstatdRmiPort.java
sun/tools/jstatd/TestJstatdDefaults.java
sun/tools/jstatd/TestJstatdServer.java

  As descript in [JDK-8333765](https://bugs.openjdk.org/browse/JDK-8333765), the jdk17 has several additional `[Jstatd-Thread] WARNING:`, these warning messages can't deal with by `asLinesWithoutVMWarnings()`, so I add `asLinesWithoutAnythingWarnings()` to deal these warning messages. Only change the testcases, the risk is low.

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Commit messages:
 - 8333765: [17u] Six sun/tools/jstatd testcases fail after JDK-8233725

Changes: https://git.openjdk.org/jdk17u-dev/pull/2548/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=2548&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8333765
  Stats: 17 lines in 2 files changed: 14 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/2548.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/2548/head:pull/2548

PR: https://git.openjdk.org/jdk17u-dev/pull/2548