gitlab: Add HDF5 + GASNet; reduce use of expensive checks.
gitlab: Add HDF5 + GASNet; reduce use of expensive checks.

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