move cache testing into CacheFilterTeset
move cache testing into CacheFilterTeset

mpgerlek/PDAL-old,jwomeara/PDAL,boundlessgeo/PDAL,jwomeara/PDAL,mpgerlek/PDAL-old,lucadelu/PDAL,verma/PDAL,verma/PDAL,boundlessgeo/PDAL,lucadelu/PDAL,verma/PDAL,DougFirErickson/PDAL,Sciumo/PDAL,verma/PDAL,DougFirErickson/PDAL,Sciumo/PDAL,mpgerlek/PDAL-old,radiantbluetechnologies/PDAL,Sciumo/PDAL,DougFirErickson/PDAL,verma/PDAL,lucadelu/PDAL,verma/PDAL,boundlessgeo/PDAL,mtCarto/PDAL,mtCarto/PDAL,Sciumo/PDAL,lucadelu/PDAL,radiantbluetechnologies/PDAL,mtCarto/PDAL,radiantbluetechnologies/PDAL,radiantbluetechnologies/PDAL,mtCarto/PDAL,jwomeara/PDAL,DougFirErickson/PDAL,jwomeara/PDAL,boundlessgeo/PDAL,verma/PDAL,mpgerlek/PDAL-old