RFR: 7485: JMC Application, Plugins and License Copyright year requires update

[Suchita Chaturvedi]

This PR addresses the copyright update task for JMC 8.2 release.

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Commit messages:
 - 7485: JMC Application, Plugins and License Copyright year requires update

Changes: https://git.openjdk.java.net/jmc/pull/350/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jmc&pr=350&range=00
  Issue: https://bugs.openjdk.java.net/browse/JMC-7485
  Stats: 575 lines in 311 files changed: 0 ins; 0 del; 575 mod
  Patch: https://git.openjdk.java.net/jmc/pull/350.diff
  Fetch: git fetch https://git.openjdk.java.net/jmc pull/350/head:pull/350

PR: https://git.openjdk.java.net/jmc/pull/350