added encrypted pw in postgres

configure_postgresql.yml

@@ -29,6 +29,7 @@
         db: "instance_{{ item.key }}"
         name: "{{ item.key }}"
         password: "{{ item.value.admin_pw }}"
+        encrypted: yes
         priv: ALL
         role_attr_flags: NOSUPERUSER,NOCREATEDB
         state: present