[code-reflection] RFR: [hat] Testing suite - avoid log duplications

[Juan Fumero]

HAT Testing framework suite - avoid log duplications

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Commit messages:
 - [hat] Testing suite - avoid log duplications

Changes: https://git.openjdk.org/babylon/pull/720/files
  Webrev: https://webrevs.openjdk.org/?repo=babylon&pr=720&range=00
  Stats: 4 lines in 4 files changed: 0 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/babylon/pull/720.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/720/head:pull/720

PR: https://git.openjdk.org/babylon/pull/720