Avoid deprecated unittest API
Avoid deprecated unittest API

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