RFR: 7001: Missing chromium binary message on MacOS X

[Guru Hb]

RC : property "-Dorg.eclipse.swt.browser.DefaultType=chromium" was added to all three platform configuration file (jmc.ini) as it as supposed to be only for windows platform.

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Commit messages:
 - 7001: Missing chromium binary message on MacOS X

Changes: https://git.openjdk.java.net/jmc/pull/166/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jmc&pr=166&range=00
  Issue: https://bugs.openjdk.java.net/browse/JMC-7001
  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/jmc/pull/166.diff
  Fetch: git fetch https://git.openjdk.java.net/jmc pull/166/head:pull/166

PR: https://git.openjdk.java.net/jmc/pull/166