fix file perms on /root/.ssh/authorized_keys

manifests/ssh.pp

@@ -117,8 +117,9 @@ class base::ssh(
 
   if ($root_authorized_keys) {
     file { '/root/.ssh/authorized_keys':
-      ensure => present,
+      ensure  => present,
       content => $root_authorized_keys,
+      mode    => '0640',
     }
   } else {
     # Make sure public key authentication to root does not work and clean up