Speed up a little bit.
Speed up a little bit.

Instead of createing all of DB nodes initially, create data0 at first
start pgool. Then add standys to pgpool.conf and reload it. This
avoids sleeping after first failover(was 20 seconds).

treasure-data/prestogres,treasure-data/prestogres,treasure-data/prestogres,treasure-data/prestogres,treasure-data/prestogres,treasure-data/prestogres,treasure-data/prestogres