[jdk11u-dev] RFR: 8332113: Update nsk.share.Log to be always verbose

[Andrew Lu]

I backport this for parity with 11.0.25-oracle.

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Commit messages:
 - Backport 8464ce6db5cbd5d50ac2a2bcba905b7255f510f5

Changes: https://git.openjdk.org/jdk11u-dev/pull/2890/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=2890&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8332113
  Stats: 10 lines in 1 file changed: 0 ins; 4 del; 6 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/2890.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/2890/head:pull/2890

PR: https://git.openjdk.org/jdk11u-dev/pull/2890