Use hashlib for HDF5 caches in python3
Use hashlib for HDF5 caches in python3

- Fixes #931

Change-Id: I2234f28da1c0a9119f434338f7e034da3111d6d6
Signed-off-by: Diana Guttman <98d11df29868673c9a01b97a41154316626a31b0@intel.com>

cmcantalupo/geopm,cmcantalupo/geopm,geopm/geopm,geopm/geopm,geopm/geopm,geopm/geopm,cmcantalupo/geopm,cmcantalupo/geopm,cmcantalupo/geopm,geopm/geopm