Fix broken geopmread helper
Fix broken geopmread helper

- The previous logic was OK for Python 2, but not for 3.

Change-Id: I1a922e11042eb43fd0bd29aa0f97130fd64da4ac
Signed-off-by: Brad Geltz <e42f3ad4099980ea02f08e076efbee5cf9d4a803@intel.com>

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