RFR: 7069: Move rjmx bundle from application to core [v4]

[Alex Macdonald]

> This PR addresses JMC-6627 [[0]](https://bugs.openjdk.org/browse/JMC-6627) in which it would be nice to bring some bundles from application to core. Most notably, **flightrecorder.configuration** which has a PR open for review [[1]](https://github.com/openjdk/jmc/pull/469) and is also tracked by JMC-7307 [[2]](https://bugs.openjdk.org/browse/JMC-7307), and **RJMX** which is also tracked by JMC-7069 [[3]](https://bugs.openjdk.org/browse/JMC-7069).
> 
> While #469 is still under review, I copied a branch of it and squashed all the commits down into one commit [[4]](https://github.com/openjdk/jmc/commit/72c08b3f65671d16fcbb1333a5782e10ac9c874f) for easier rebasing. Review comments for flightrecorder.configuration should go towards #469.  RJMX does have reliance on the flightrecorder.configuration changes (and some still in ui.common), so the second commit [[5]](https://github.com/openjdk/jmc/commit/f1c828dd46f24d9075cd3eedbf5a15bb9daf9a72) here is where this PR really starts. Once #469 is merged I can rebase this PR so that it handles RJMX.
> 
> As mentioned in JMC-6627 [[0]](https://bugs.openjdk.org/browse/JMC-6627), because of the way Eclipse is intertwined with the RJMX code, this isn't a straightforward movement of classes. There are some parts that will need to stay on the side of jmc/application, but much of the code can come over to jmc/core with modification. This is accomplished by having a `rjmx.common` module in core, and keeping regular `rjmx` in application.
> 
> There are a handful of classes (e.g., `NameConverter`, `SyntheticAttributeRepository`, `SyntheticNotificationRepository`, ..) that use Eclipse to initialize them by parsing through values in plugin.xml, or use classes (like Persistence and Preferences) that are closely tied to the Eclipse RCP side of things. I brought over these classes to core and kept the code that initializes the values from extensions on the application side, so they could be set from application -> core when running JMC, but for third-party applications that want to use the RJMX code then they might not need/require this initialization.
> 
> [0] https://bugs.openjdk.org/browse/JMC-6627
> [1] https://github.com/openjdk/jmc/pull/469
> [2] https://bugs.openjdk.org/browse/JMC-7307
> [3] https://bugs.openjdk.org/browse/JMC-7069
> [4] https://github.com/openjdk/jmc/commit/72c08b3f65671d16fcbb1333a5782e10ac9c874f
> [5] https://github.com/openjdk/jmc/commit/f1c828dd46f24d9075cd3eedbf5a15bb9daf9a72

Alex Macdonald has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains eight commits:

 - Remove duplication of MRITransformationToolkit
 - Remove flightrecorder.configuration from application/coverage
 - Fix typo in SyntheticRepositoryInitializer function
 - Fix typo in license header
 - Update license headers
 - Restore rjmx.services.jfr Messages.java
 - 6627: Bring bundles to core
 - 7307: Move org.openjdk.jmc.flightrecorder.configuration bundle from application to core

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Changes: https://git.openjdk.org/jmc/pull/531/files
 Webrev: https://webrevs.openjdk.org/?repo=jmc&pr=531&range=03
  Stats: 12192 lines in 479 files changed: 5692 ins; 5386 del; 1114 mod
  Patch: https://git.openjdk.org/jmc/pull/531.diff
  Fetch: git fetch https://git.openjdk.org/jmc.git pull/531/head:pull/531

PR: https://git.openjdk.org/jmc/pull/531