RFR: 7903440: JMH: Add automatic module names [v2]

[Hendrik Ebbers]

> `maven-jar-plugin` is used to add "Automatic-Module-Name" to `MANIFEST.MF` at buildtime. This is the minimum that is needed if you want to use the lib on the module path in a project.

Hendrik Ebbers has updated the pull request incrementally with one additional commit since the last revision:

  Update pom.xml

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Changes:
  - all: https://git.openjdk.org/jmh/pull/90/files
  - new: https://git.openjdk.org/jmh/pull/90/files/8a3ee240..2dfe381c

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jmh&pr=90&range=01
 - incr: https://webrevs.openjdk.org/?repo=jmh&pr=90&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jmh/pull/90.diff
  Fetch: git fetch https://git.openjdk.org/jmh.git pull/90/head:pull/90

PR: https://git.openjdk.org/jmh/pull/90