[jdk11u-dev] RFR: 8276139: TestJpsHostName.java not reliable, better to expand HostIdentifierCreate.java test

[Jie Fu]

Hi all,

I'd like to backport this fix to jdk11u to improve the test stability.
This is a noreg test improvement, so no risk.

Only changes in test/jdk/sun/tools/jps/TestJpsHostName.java can't be applied cleanly.
But it doesn't matter since that file would be removed after this backport.
And the affected tests all passed on linux after this patch.

Thanks.
Best regards,
Jie

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Commit messages:
 - Backport 2af9e5976fdf94afc7dbe5ad7827553818057bae

Changes: https://git.openjdk.java.net/jdk11u-dev/pull/643/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=643&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8276139
  Stats: 61 lines in 3 files changed: 14 ins; 46 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk11u-dev/pull/643.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk11u-dev pull/643/head:pull/643

PR: https://git.openjdk.java.net/jdk11u-dev/pull/643