Add a unit test for the "psfsum" interpolation method. TODO - we need to make the pfsum a downsampler fill as well.
Add a unit test for the "psfsum" interpolation method.
TODO - we need to make the pfsum a downsampler fill as well.

MadDogTechnology/opentsdb,OpenTSDB/opentsdb,OpenTSDB/opentsdb,MadDogTechnology/opentsdb,MadDogTechnology/opentsdb,OpenTSDB/opentsdb