Added schema to server functions and fixed some errors

server/extension/sql/0.0.1/20_geocode_street.sql

@@ -1,5 +1,5 @@
 -- Geocodes a street address given a searchtext and a state and/or country
-CREATE OR REPLACE FUNCTION geocode_street(searchtext TEXT, city TEXT DEFAULT NULL, state_province TEXT DEFAULT NULL, country TEXT DEFAULT NULL)
+CREATE OR REPLACE FUNCTION cdb_geocoder_server.geocode_street(searchtext TEXT, city TEXT DEFAULT NULL, state_province TEXT DEFAULT NULL, country TEXT DEFAULT NULL)
   RETURNS Geometry
 AS $$
   import json
@@ -19,4 +19,4 @@ AS $$
   point = plpy.execute(plan, [coordinates[0], coordinates[1]], 1)[0]
 
   return point['st_setsrid']
-$$ LANGUAGE plpythonu;
+$$ LANGUAGE plpythonu;