Added const to filtered input iterator
Added const to filtered input iterator

Co-authored-by: Christopher Cantalupo <f09a5efa77b36fd9c7a83c8febaf3640fcdaa1d8@gmail.com>
geopm/geopm,cmcantalupo/geopm,cmcantalupo/geopm,geopm/geopm,geopm/geopm,cmcantalupo/geopm,cmcantalupo/geopm,cmcantalupo/geopm,geopm/geopm,geopm/geopm