(replacing cldrbug #2347 with more specific bugs)
Currently LDML2ICUConverter does not convert the supplementalData/territoryInfo element and its subelements (in supplemental/supplementalData.xml) for use by ICU. It should, needed for ICU: http://bugs.icu-project.org/trac/ticket/6763
This probably needs a design proposal and discussion in TC, moving to 22
note that the supplemental languageData already being converted may address the ICU requirement, so this can move later.