RFR: 8294: Missing plugins in JMC-Eclipse-plug-ins, JMC-Eclipse and JMC-RCP-plug-ins launchers

[Virag Purnam]

Fixed the launchers, JMC-Eclipse-plug-ins, JMC-Eclipse and JMC-RCP-plug-ins

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Commit messages:
 - 8294: Missing plugins in JMC-Eclipse-plug-ins, JMC-Eclipse and JMC-RCP-plug-ins launchers

Changes: https://git.openjdk.org/jmc/pull/609/files
  Webrev: https://webrevs.openjdk.org/?repo=jmc&pr=609&range=00
  Issue: https://bugs.openjdk.org/browse/JMC-8294
  Stats: 247 lines in 3 files changed: 0 ins; 32 del; 215 mod
  Patch: https://git.openjdk.org/jmc/pull/609.diff
  Fetch: git fetch https://git.openjdk.org/jmc.git pull/609/head:pull/609

PR: https://git.openjdk.org/jmc/pull/609