added compute_lane_segments_from_points for path_test.
added compute_lane_segments_from_points for path_test.

jinghaomiao/apollo,xiaoxq/apollo,ycool/apollo,ycool/apollo,wanglei828/apollo,wanglei828/apollo,xiaoxq/apollo,ApolloAuto/apollo,jinghaomiao/apollo,xiaoxq/apollo,wanglei828/apollo,ApolloAuto/apollo,jinghaomiao/apollo,jinghaomiao/apollo,ApolloAuto/apollo,ApolloAuto/apollo,jinghaomiao/apollo,xiaoxq/apollo,ApolloAuto/apollo,xiaoxq/apollo,xiaoxq/apollo,wanglei828/apollo,ApolloAuto/apollo,ycool/apollo,ycool/apollo,ycool/apollo,wanglei828/apollo,ycool/apollo,wanglei828/apollo,jinghaomiao/apollo