Fix iterator interface for py2
Fix iterator interface for py2

sklam/numba,jriehl/numba,stonebig/numba,stuartarchibald/numba,jriehl/numba,seibert/numba,IntelLabs/numba,IntelLabs/numba,sklam/numba,stuartarchibald/numba,stonebig/numba,cpcloud/numba,stonebig/numba,seibert/numba,numba/numba,numba/numba,cpcloud/numba,seibert/numba,sklam/numba,gmarkall/numba,stonebig/numba,seibert/numba,numba/numba,stuartarchibald/numba,IntelLabs/numba,IntelLabs/numba,stuartarchibald/numba,jriehl/numba,IntelLabs/numba,cpcloud/numba,sklam/numba,seibert/numba,gmarkall/numba,gmarkall/numba,stuartarchibald/numba,numba/numba,gmarkall/numba,cpcloud/numba,jriehl/numba,stonebig/numba,jriehl/numba,sklam/numba,numba/numba,cpcloud/numba,gmarkall/numba