RFR: 6915: JMC dev launchers do not include JOverflow

[Marcus Hirt]

Also cleaned up formatting and added proper license headers.

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Commit messages:
 - Added ending line breaks where missing for consistency
 - 6915: JMC dev launchers do not include JOverflow

Changes: https://git.openjdk.java.net/jmc/pull/115/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jmc&pr=115&range=00
  Issue: https://bugs.openjdk.java.net/browse/JMC-6915
  Stats: 740 lines in 9 files changed: 176 ins; 0 del; 564 mod
  Patch: https://git.openjdk.java.net/jmc/pull/115.diff
  Fetch: git fetch https://git.openjdk.java.net/jmc pull/115/head:pull/115

PR: https://git.openjdk.java.net/jmc/pull/115