ticket:8449: Review change - Changed the test case name Test8449 to TestIslamicUmAlQura. Also fixed a problem in the previous change and added some comments including ticket#s to be tracked later.

git-svn-id: http://source.icu-project.org/repos/icu/icu4j/branches/yoshito@34433 251d0590-4201-4cf1-90de-194747b24ca1