KNN: Fix hardcoded point label
KNN: Fix hardcoded point label

hpandeycodeit/incubator-madlib,apache/incubator-madlib,orhankislal/incubator-madlib,hpandeycodeit/incubator-madlib,orhankislal/incubator-madlib,njayaram2/madlib,njayaram2/incubator-madlib,hpandeycodeit/incubator-madlib,orhankislal/incubator-madlib,njayaram2/madlib,madlib/madlib,orhankislal/madlib,njayaram2/madlib,njayaram2/incubator-madlib,orhankislal/madlib,madlib/madlib,madlib/madlib,orhankislal/madlib,hpandeycodeit/incubator-madlib,hpandeycodeit/incubator-madlib,iyerr3/incubator-madlib,madlib/madlib,orhankislal/incubator-madlib,iyerr3/incubator-madlib,iyerr3/incubator-madlib,njayaram2/madlib,orhankislal/madlib,apache/incubator-madlib,njayaram2/incubator-madlib,apache/incubator-madlib,orhankislal/madlib,iyerr3/incubator-madlib,njayaram2/madlib,njayaram2/incubator-madlib,apache/incubator-madlib,iyerr3/incubator-madlib,njayaram2/incubator-madlib,orhankislal/incubator-madlib,apache/incubator-madlib,madlib/madlib