RFR: 8416: Better Eclipse classpath entry defaults

[Marcus Hirt]

Should be pom derived.

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Commit messages:
 - Removing explicit runtime versions
 - 8614: Better classpath defaults

Changes: https://git.openjdk.org/jmc/pull/663/files
  Webrev: https://webrevs.openjdk.org/?repo=jmc&pr=663&range=00
  Issue: https://bugs.openjdk.org/browse/JMC-8416
  Stats: 1896 lines in 130 files changed: 1605 ins; 1 del; 290 mod
  Patch: https://git.openjdk.org/jmc/pull/663.diff
  Fetch: git fetch https://git.openjdk.org/jmc.git pull/663/head:pull/663

PR: https://git.openjdk.org/jmc/pull/663