cloudconfig: do not touch PasswordAuthentication

We have some application where we set PasswordAuthentication to "yes" in
sshd_config. This has always worked, but for some reason cloud-init
recently started setting it back to "no".

Tell cloud-init to just not touch our config by setting ssh_pwauth to
unchanged.

Author: chrboe

internal/virter/cloudconfig.go

@@ -15,6 +15,7 @@ local-hostname: {{ .VMName }}
 
 const templateUserData = `#cloud-config
 disable_root: False
+ssh_pwauth: unchanged
 ssh_authorized_keys:
 {{- range .SSHPublicKeys }}
   - {{ . }}