RFR: 7903911: JMH: Profiler integration tests should use hot methods [v2]

[Aleksey Shipilev]

> Profiler tests are more reliable if we run hot methods as their targets. Otherwise we can never see the methods in profiles. This can be made a bit more reliable.

Aleksey Shipilev has updated the pull request incrementally with one additional commit since the last revision:

  Also separate profiler and batchsize tests into serial group

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Changes:
  - all: https://git.openjdk.org/jmh/pull/150/files
  - new: https://git.openjdk.org/jmh/pull/150/files/89085ea2..b76d37f7

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jmh&pr=150&range=01
 - incr: https://webrevs.openjdk.org/?repo=jmh&pr=150&range=00-01

  Stats: 7 lines in 1 file changed: 3 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/jmh/pull/150.diff
  Fetch: git fetch https://git.openjdk.org/jmh.git pull/150/head:pull/150

PR: https://git.openjdk.org/jmh/pull/150