RFR: 8269523: runtime/Safepoint/TestAbortOnVMOperationTimeout.java failed when expecting 'VM operation took too long'

[David Holmes]

Please review this simple test adjustment:
 - dropped 5ms timeout as we have seen execution as low as 2ms
 - enabled GC logging
 - report output in all cases to allow ease of analysis

Testing: ran 10x on macos/linux/Windows x64 and macos Aarch64 to check execution times and adjusted test accordingly

Thanks,
David

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Commit messages:
 - 8269523: runtime/Safepoint/TestAbortOnVMOperationTimeout.java failed when expecting 'VM operation took too long'

Changes: https://git.openjdk.java.net/jdk/pull/4901/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=4901&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8269523
  Stats: 7 lines in 1 file changed: 2 ins; 1 del; 4 mod
  Patch: https://git.openjdk.java.net/jdk/pull/4901.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/4901/head:pull/4901

PR: https://git.openjdk.java.net/jdk/pull/4901