Remove cloud-init details

If we have booted with cloud-init, then this status directory is
populated.  Remove it so when we boot snapshot images, they behave as
if on a fresh system.

Change-Id: Idc9ce01290b659e3239d30be847221447a8e5e84

nodepool/scripts/prepare_node.sh

@@ -182,6 +182,9 @@ datasource_list: [ ConfigDrive, None ]
 EOF
 fi
 
+# reset cloud-init
+sudo rm -rf /var/lib/cloud/instances
+
 sudo bash -c "echo 'include: /etc/unbound/forwarding.conf' >> /etc/unbound/unbound.conf"
 if [ -e /etc/init.d/unbound ] ; then
     sudo /etc/init.d/unbound restart