[jdk8u-dev] RFR: 8301332: [8u] Fix writing of test files after the cgroups v2 backport [v3]

[Severin Gehwolf]

> Please review this trivial refactoring of test files. It fixes usages of `Files.write(..., String.getBytes())`  to `Files.write(..., String.getBytes(StandardCharsets.UTF-8))`. Affected files don't contain non-ascii content, but it's a good cleanup to do anyway.
> 
> Testing:
> - [x] Tests compile, run and pass (as before)
> 
> Thoughts?

Severin Gehwolf has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains one additional commit since the last revision:

  8301332: [8u] Fix writing of test files after the cgroups v2 backport

-------------

Changes:
  - all: https://git.openjdk.org/jdk8u-dev/pull/252/files
  - new: https://git.openjdk.org/jdk8u-dev/pull/252/files/af674227..fbaeeb80

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk8u-dev&pr=252&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk8u-dev&pr=252&range=01-02

  Stats: 248 lines in 14 files changed: 134 ins; 65 del; 49 mod
  Patch: https://git.openjdk.org/jdk8u-dev/pull/252.diff
  Fetch: git fetch https://git.openjdk.org/jdk8u-dev pull/252/head:pull/252

PR: https://git.openjdk.org/jdk8u-dev/pull/252