RFR: 7903998: Move checkstyle/findbugs xml to under src/test/resources

[Galder Zamarreño]

Fixes https://bugs.openjdk.org/browse/CODETOOLS-7903998

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Commit messages:
 - 7903998: Move checkstyle/findbugs xml to under src/test/resources

Changes: https://git.openjdk.org/jmh/pull/157/files
  Webrev: https://webrevs.openjdk.org/?repo=jmh&pr=157&range=00
  Issue: https://bugs.openjdk.org/browse/CODETOOLS-7903998
  Stats: 2 lines in 3 files changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jmh/pull/157.diff
  Fetch: git fetch https://git.openjdk.org/jmh.git pull/157/head:pull/157

PR: https://git.openjdk.org/jmh/pull/157