Sort the index after remapping its values
Sort the index after remapping its values

- Fixes an UnsortedIndexError in TestBalancerAnalysis on pandas 0.25.0

Signed-off-by: Daniel Wilson <c0a46a3457096bdbf302f01d2d37cf72d30c651c@intel.com>
Change-Id: Ifcb3a40e472cb332fd81632cf33ffe49720f4a27

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