RFR: 7903392: Update to commons-math3 3.6.1

[Thomas Traude]

7903392: Update to commons-math3 3.6.1

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Commit messages:
 - Update to commons-math3 3.6.1

Changes: https://git.openjdk.org/jmh/pull/89/files
 Webrev: https://webrevs.openjdk.org/?repo=jmh&pr=89&range=00
  Issue: https://bugs.openjdk.org/browse/CODETOOLS-7903392
  Stats: 2 lines in 2 files changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jmh/pull/89.diff
  Fetch: git fetch https://git.openjdk.org/jmh pull/89/head:pull/89

PR: https://git.openjdk.org/jmh/pull/89