RFR: 7307: Move org.openjdk.jmc.flightrecorder.configuration bundle from application to core [v7]

[Joshua Matsuoka]

> This PR addresses JMC-7307 [[0]](https://bugs.openjdk.java.net/browse/JMC-7307), in which it would be helpful to have flightrecorder.configuration distributed in jmc core.
> 
> This PR continues from #299 , Alex is currently away so I'll be continuing this PR/bug. This PR builds off of Alex's existing branch and preserves the history. It fixes the merge conflicts and addresses the remaining review comments on #299 .
> 
> [0] https://bugs.openjdk.java.net/browse/JMC-7307

Joshua Matsuoka has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 24 commits:

 - Merging changes from upstream
 - Import cleanup
 - Running spotless
 - Removing extraneous merge artifacts
 - Merge remote-tracking branch 'upstream/master' into 7307
 - running spotlesS
 - Fixing merge conflicts
 - Merge remote-tracking branch 'upstream/master' into 7307
 - Fixing manifest
 - Fixing visibility of XML classes
 - ... and 14 more: https://git.openjdk.org/jmc/compare/b0d11227...7904676a

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Changes: https://git.openjdk.org/jmc/pull/469/files
 Webrev: https://webrevs.openjdk.org/?repo=jmc&pr=469&range=06
  Stats: 1066 lines in 106 files changed: 326 ins; 560 del; 180 mod
  Patch: https://git.openjdk.org/jmc/pull/469.diff
  Fetch: git fetch https://git.openjdk.org/jmc.git pull/469/head:pull/469

PR: https://git.openjdk.org/jmc/pull/469