RFR: 7903367: JMH: Add JMHSample_39_MemoryAccess [v5]

[Michael Mirwaldt]

> I propose this sample because overlooking the memory layout of e.g. ArrayLists can be a pitfall for benchmarks.
> This new sample makes users of JMH aware of this problem. It teaches them how to use JMH right.
> What do you think?

Michael Mirwaldt has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains ten additional commits since the last revision:

 - Merge branch 'samples/JMHSample_39_MemoryAccess' of https://github.com/mmirwaldt/jmh into samples/JMHSample_39_MemoryAccess
 - Merge branch 'openjdk:master' into samples/JMHSample_39_MemoryAccess
 - added shuffled array list
 - added time unit to annotations
 - corrected author email
 - improved by proposals from first review
 - Update JMHSample_39_MemoryAccess.java
 - Removed duplicate of copyright banner
 - added sample JMHSample_39_MemoryAccess

-------------

Changes:
  - all: https://git.openjdk.org/jmh/pull/85/files
  - new: https://git.openjdk.org/jmh/pull/85/files/8b0a9734..990e0ea6

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jmh&pr=85&range=04
 - incr: https://webrevs.openjdk.org/?repo=jmh&pr=85&range=03-04

  Stats: 518 lines in 61 files changed: 211 ins; 151 del; 156 mod
  Patch: https://git.openjdk.org/jmh/pull/85.diff
  Fetch: git fetch https://git.openjdk.org/jmh pull/85/head:pull/85

PR: https://git.openjdk.org/jmh/pull/85