ticket:10577: Added a test case in ICU4C to check if the calendar factory method uses locale's region to initialize week data. ICU4C library code is working fine, so no changes in the library code.

git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk/source@35002 251d0590-4201-4cf1-90de-194747b24ca1