RFR: 7455: Add support for jolokia JMX service connection

[Martin Skarsaune]

Make use of support for JMX service connection in jolokia 1.7.0 and later to connect to JVMs over this protocol.

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Commit messages:
 - Adding test plugin for Jolokia
 - Revert unwanted change unrelated to new plugins
 - Added copyright notices. Removed author tag and meaningless comments
 - No reason more than Java 8 should be required
 - Working on spotbugs errors and build problems
 - [WIP] Jolokia support

Changes: https://git.openjdk.java.net/jmc/pull/332/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jmc&pr=332&range=00
  Issue: https://bugs.openjdk.java.net/browse/JMC-7455
  Stats: 3142 lines in 47 files changed: 3142 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jmc/pull/332.diff
  Fetch: git fetch https://git.openjdk.java.net/jmc pull/332/head:pull/332

PR: https://git.openjdk.java.net/jmc/pull/332