fix group by edge's props
fix group by edge's props

SteamShon/incubator-s2graph,daewon/incubator-s2graph,SteamShon/incubator-s2graph,jongwook/incubator-s2graph,SteamShon/incubator-s2graph,daewon/incubator-s2graph,jongwook/incubator-s2graph