ticket:9077: Enhancements to break iteration tests.

git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk/source@33233 251d0590-4201-4cf1-90de-194747b24ca1
ticket:9077: Fix failing test rbbi/RBBITest/TestExtended

git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk/source@33234 251d0590-4201-4cf1-90de-194747b24ca1