[jdk17] RFR: 8268863: ProblemList serviceability/sa/TestJmapCoreMetaspace.java on linux-x64 with ZGC

[Yasumasa Suenaga]

In order to reduce the noise in the JDK17 CI, I'm ProblemListing serviceability/sa/TestJmapCoreMetaspace.java on linux-x64 with ZGC.

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Commit messages:
 - 8268863: ProblemList serviceability/sa/TestJmapCoreMetaspace.java on linux-x64 with ZGC

Changes: https://git.openjdk.java.net/jdk17/pull/72/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk17&pr=72&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8268863
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk17/pull/72.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk17 pull/72/head:pull/72

PR: https://git.openjdk.java.net/jdk17/pull/72