ticket:10246: Remove extra lenient-parse rules from source/data/xml (again).

git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk/source@34023 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10252: Switch rbnf and brkitr conversion to use the new converter.

git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk/source@34024 251d0590-4201-4cf1-90de-194747b24ca1