RFR: CODETOOLS-7902825: Generated BenchmarkList filte should be sorted for reproducibility

[Aleksey Shipilev]

As stated in the RFE, JMH should sort BenchmarkListEntries before writing them out. It is cleaner to do in `BenchmarkList` itself, as it allows unit testing.

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Commit messages:
 - Initial revision

Changes: https://git.openjdk.java.net/jmh/pull/19/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jmh&pr=19&range=00
  Issue: https://bugs.openjdk.java.net/browse/CODETOOLS-7902825
  Stats: 111 lines in 3 files changed: 105 ins; 1 del; 5 mod
  Patch: https://git.openjdk.java.net/jmh/pull/19.diff
  Fetch: git fetch https://git.openjdk.java.net/jmh pull/19/head:pull/19

PR: https://git.openjdk.java.net/jmh/pull/19