Adapt jitclasses test to use new debugging utility for accessing internal members that are no longer exposed.
Adapt jitclasses test to use new debugging utility
for accessing internal members that are no longer exposed.

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