RFR: CODETOOLS-7903021: jcstress: Dining Philosophers problem sample [v4]

[Michael Mirwaldt]

> This s my initial draft fo a sample testing solutions for the dining philosophers problem:
> - Wikipedia explains it on https://en.wikipedia.org/wiki/Dining_philosophers_problem
> - It runs within 13min on my machine.
> - It includes a short comment about the motivation for that sample and
> a reference link to the wikipedia article about the dining philosophers problem. 
> - It offers 3 different solutions: with monitors, with reentrant locks and with semaphores

Michael Mirwaldt has updated the pull request incrementally with one additional commit since the last revision:

  improved comment and ResourceHierarchy solution in ClassicProblem_01_DiningPhilosophers

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Changes:
  - all: https://git.openjdk.java.net/jcstress/pull/93/files
  - new: https://git.openjdk.java.net/jcstress/pull/93/files/522f583c..f437bedc

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jcstress&pr=93&range=03
 - incr: https://webrevs.openjdk.java.net/?repo=jcstress&pr=93&range=02-03

  Stats: 6 lines in 1 file changed: 0 ins; 0 del; 6 mod
  Patch: https://git.openjdk.java.net/jcstress/pull/93.diff
  Fetch: git fetch https://git.openjdk.java.net/jcstress pull/93/head:pull/93

PR: https://git.openjdk.java.net/jcstress/pull/93