ticket:10628: Use (const DateFormat*)fmt in udat_getContext, (const NumberFormat*)fmt in unum_getContext

git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk/source@34916 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10219: Added test for 1 minute, 1.0 minutes, 1.01 minutes.

git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk/source@34918 251d0590-4201-4cf1-90de-194747b24ca1