Fix up some more non idempotent things.

tasks/persistent_cloud.yml

@@ -4,6 +4,7 @@
   local_action: shell nc -w 5 {{ inventory_hostname }} 22 < /dev/null
   register: host_is_up
   ignore_errors: true
+  changed_when: false
 
 - name: clean out old known_hosts (name based entries)
   local_action: known_hosts path={{item}} host={{inventory_hostname}} state=absent