Skip export for MediaWiki core branches for some language codes

Because CLDR 24 plural forms are not backward compatible with 1.20 and 1.21.

Change-Id: I95bf67fb29ada651e5862209723499250aa312bb
Revert puppet for mailman back to 0.4.1 release

Change-Id: I2ec00a5f77de6dc40a7c1a09b0ab294ae6907eec