Replace @@plpythonu@@ vars in old_versions

server/extension/old_versions/cdb_dataservices_server--0.0.1--0.1.0.sql

@@ -46,7 +46,7 @@ RETURNS boolean AS $$
       'redis_metrics_connection': redis_metrics_connection,
     }
     return True
-$$ LANGUAGE plpythonu SECURITY DEFINER;
+$$ LANGUAGE @@plpythonu@@ SECURITY DEFINER;
 
 -- Get the Redis configuration from the _conf table --
 CREATE OR REPLACE FUNCTION cdb_dataservices_server._get_geocoder_config(username text, orgname text)
@@ -72,7 +72,7 @@ RETURNS boolean AS $$
     # --for this user session but...
     GD[cache_key] = geocoder_config
     return True
-$$ LANGUAGE plpythonu SECURITY DEFINER;
+$$ LANGUAGE @@plpythonu@@ SECURITY DEFINER;
 
 -- Geocodes a street address given a searchtext and a state and/or country
 DROP FUNCTION IF EXISTS cdb_dataservices_server.cdb_geocode_street_point(TEXT, TEXT, TEXT, TEXT);