RFR: 6662: Updating to Eclipse 2019-12 (4.14)

[Marcus Hirt]

Also removing old outdated versions. Keeping 2 last plus photon (mainly for Mac developers that hasn't upgraded to 2019-12).

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Commits:
 - 09667aaf: 6662: Updating to Eclipse 2019-12 (4.14)

Changes: https://git.openjdk.java.net/jmc/pull/24/files
 Webrev: https://webrevs.openjdk.java.net/jmc/24/webrev.00
  Issue: https://bugs.openjdk.java.net/browse/JMC-6662
  Stats: 642 lines in 13 files changed: 113 ins; 507 del; 22 mod
  Patch: https://git.openjdk.java.net/jmc/pull/24.diff
  Fetch: git fetch https://git.openjdk.java.net/jmc pull/24/head:pull/24

PR: https://git.openjdk.java.net/jmc/pull/24