RFR: 8240: Upgrade HdrHistogram to 2.2.2

[Virag Purnam]

HdrHistogram has new features and fixes. https://github.com/HdrHistogram/HdrHistogram/releases
It is good to upgrade to latest version.

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Commit messages:
 - 8240: Upgrade HdrHistogram to 2.2.2

Changes: https://git.openjdk.org/jmc/pull/571/files
  Webrev: https://webrevs.openjdk.org/?repo=jmc&pr=571&range=00
  Issue: https://bugs.openjdk.org/browse/JMC-8240
  Stats: 5 lines in 3 files changed: 1 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/jmc/pull/571.diff
  Fetch: git fetch https://git.openjdk.org/jmc.git pull/571/head:pull/571

PR: https://git.openjdk.org/jmc/pull/571