rename to match numbering elsewhere

src/pg/test/sql/11_kmeans_test.sql

@@ -0,0 +1,6 @@
+\pset format unaligned
+\set ECHO all
+
+SELECT count(DISTINCT cluster_no) as clusters from cdb_crankshaft.cdb_kmeans('select * from ppoints', 2);
+
+SELECT count(*) clusters from (select  cdb_crankshaft.CDB_WeightedMean(the_geom, value::NUMERIC), code from ppoints group by code) p;