fix password auth

files/cloud_init.cfg.tftpl

@@ -1,7 +1,6 @@
 #cloud-config
 hostname: "${name}"
 manage_etc_hosts: true
-ssh_pwauth: ${ssh_pwauth}
 disable_root: false
 ssh_authorized_keys:
 %{ for key in admin_authorized_keys ~}
@@ -12,6 +11,9 @@ chpasswd:
   list: |
     root:root
   expire: False
+ssh_pwauth: true
+%{ else }
+ssh_pwauth: false
 %{ endif }
 %{ if use_host_cert }
 ssh_keys: