Cleanup test env var in PlatformTopoTest
Cleanup test env var in PlatformTopoTest

Change-Id: I1dc3b93a95967ccb14b8cf637c1def2f6a152bea
Signed-off-by: Brandon Baker <a57ed95460e44c7b5dd675b778bcd98e47bd07ea@intel.com>

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