Sort unit test: Fix bug in unit tests for radix and counting sort
Sort unit test: Fix bug in unit tests for radix and counting sort

1. Specialize the unit tests for radix sort as for counting
   sort, since signed integers of same size used as value
   type and random type may cause an overflow.

2. However unsigned integers of same size can be used and
   therefore modify the unit tests for counting sort
   suitably.

veerajskhokale/libadcpp