ticket:10284: Remove unnecessary enviroment variables required by LDML2ICU conversion process.

git-svn-id: http://source.icu-project.org/repos/icu/icu@34012 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10284: Remove redundant cldrVersion args.

git-svn-id: http://source.icu-project.org/repos/icu/icu@34013 251d0590-4201-4cf1-90de-194747b24ca1
ticket:9101: test proposed Korean searchjl tailoring with prefixes, CldrBug:6546

git-svn-id: http://source.icu-project.org/repos/icu/icu@34014 251d0590-4201-4cf1-90de-194747b24ca1