travis: Turn off macOS testing for HDF5 at the moment.
travis: Turn off macOS testing for HDF5 at the moment.

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