Add test for optional setattr
Add test for optional setattr

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