Added unit test set for DUFunc.
Added unit test set for DUFunc.

ssarangi/numba,gdementen/numba,pombredanne/numba,numba/numba,IntelLabs/numba,pitrou/numba,stuartarchibald/numba,stuartarchibald/numba,GaZ3ll3/numba,gdementen/numba,stuartarchibald/numba,gdementen/numba,stefanseefeld/numba,pitrou/numba,cpcloud/numba,stonebig/numba,IntelLabs/numba,GaZ3ll3/numba,ssarangi/numba,numba/numba,stuartarchibald/numba,IntelLabs/numba,pombredanne/numba,stefanseefeld/numba,gdementen/numba,IntelLabs/numba,IntelLabs/numba,pitrou/numba,ssarangi/numba,stefanseefeld/numba,stuartarchibald/numba,pombredanne/numba,sklam/numba,cpcloud/numba,stonebig/numba,gmarkall/numba,sklam/numba,numba/numba,pitrou/numba,GaZ3ll3/numba,stonebig/numba,seibert/numba,gmarkall/numba,gdementen/numba,jriehl/numba,pombredanne/numba,numba/numba,gmarkall/numba,pitrou/numba,sklam/numba,seibert/numba,gmarkall/numba,numba/numba,cpcloud/numba,sklam/numba,jriehl/numba,GaZ3ll3/numba,cpcloud/numba,seibert/numba,jriehl/numba,stonebig/numba,GaZ3ll3/numba,stefanseefeld/numba,seibert/numba,ssarangi/numba,ssarangi/numba,pombredanne/numba,gmarkall/numba,stefanseefeld/numba,jriehl/numba,seibert/numba,cpcloud/numba,sklam/numba,jriehl/numba,stonebig/numba