RFR: 8236: Add support for Jolokia discovery [v2]

[Martin Skarsaune]

> Jolokia comes with a discovery mechanism. It is helpful to make use of this to automatically populate the JVM browser, alongside local JVM and other discovery mechanisms.
> 
> https://jolokia.org/reference/html/manual/jolokia_protocol.html#discovery

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

  JMC-8236: Added copyright notice. Corrected settings header

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Changes:
  - all: https://git.openjdk.org/jmc/pull/570/files
  - new: https://git.openjdk.org/jmc/pull/570/files/bd69881f..2445326d

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jmc&pr=570&range=01
 - incr: https://webrevs.openjdk.org/?repo=jmc&pr=570&range=00-01

  Stats: 34 lines in 2 files changed: 33 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jmc/pull/570.diff
  Fetch: git fetch https://git.openjdk.org/jmc.git pull/570/head:pull/570

PR: https://git.openjdk.org/jmc/pull/570