add v1 label test on IntegritySpec.
add v1 label test on IntegritySpec.

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