test: Add testing for C++ Legion codes that require HDF5.
test: Add testing for C++ Legion codes that require HDF5.

StanfordLegion/legion,StanfordLegion/legion,sdalton1/legion,StanfordLegion/legion,sdalton1/legion,sdalton1/legion,sdalton1/legion,StanfordLegion/legion,StanfordLegion/legion,StanfordLegion/legion,StanfordLegion/legion,StanfordLegion/legion,sdalton1/legion,sdalton1/legion