RFR: 8286: Fix broken launcher [v2]

[Marcus Hirt]

> The launcher for launching JMC from within the development environment in Eclipse is broken. Going by features and adding some additional plug-ins solve it for me. Let me know if it works better for you too.

Marcus Hirt has updated the pull request incrementally with one additional commit since the last revision:

  Fixing cut-and-paste problem

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Changes:
  - all: https://git.openjdk.org/jmc/pull/601/files
  - new: https://git.openjdk.org/jmc/pull/601/files/ed548be8..953b2fdb

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jmc&pr=601&range=01
 - incr: https://webrevs.openjdk.org/?repo=jmc&pr=601&range=00-01

  Stats: 122 lines in 1 file changed: 0 ins; 1 del; 121 mod
  Patch: https://git.openjdk.org/jmc/pull/601.diff
  Fetch: git fetch https://git.openjdk.org/jmc.git pull/601/head:pull/601

PR: https://git.openjdk.org/jmc/pull/601