8332113: Update nsk.share.Log to be always verbose

[luchenlin]

I backport this for parity with 11.0.25-oracle.

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Progress

• [x] Change must not contain extraneous whitespace
• [x] Commit message must refer to an issue
• [ ] JDK-8332113 needs maintainer approval

Issue

• JDK-8332113: Update nsk.share.Log to be always verbose (Enhancement - P4 - Requested)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk11u-dev.git pull/2890/head:pull/2890
$ git checkout pull/2890

Update a local copy of the PR:
$ git checkout pull/2890
$ git pull https://git.openjdk.org/jdk11u-dev.git pull/2890/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 2890

View PR using the GUI difftool:
$ git pr show -t 2890

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk11u-dev/pull/2890.diff

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