RFR: 7455: Add support for jolokia JMX service connection [v20]

[Martin Skarsaune]

> Replaces parts of https://github.com/openjdk/jmc/pull/332

Martin Skarsaune has updated the pull request incrementally with one additional commit since the last revision:

   JMC-7455: Compare certiain retrieved attributes directly with local connection

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Changes:
  - all: https://git.openjdk.org/jmc/pull/548/files
  - new: https://git.openjdk.org/jmc/pull/548/files/cb073677..816b353f

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jmc&pr=548&range=19
 - incr: https://webrevs.openjdk.org/?repo=jmc&pr=548&range=18-19

  Stats: 33 lines in 2 files changed: 17 ins; 11 del; 5 mod
  Patch: https://git.openjdk.org/jmc/pull/548.diff
  Fetch: git fetch https://git.openjdk.org/jmc.git pull/548/head:pull/548

PR: https://git.openjdk.org/jmc/pull/548