Cleanup old servers every minute.

With the blocking behaviour removed we can now cleanup more often,
picking up whatever nodes are ready in each pass.

Change-Id: Ic6907ec025973e4f378163aec1194b0204aaa6f8

modules/openstack_project/templates/nodepool/nodepool.yaml.erb

@@ -2,7 +2,7 @@ script-dir: /etc/nodepool/scripts
 dburi: 'mysql://nodepool:<%= mysql_password %>@localhost/nodepool'
 
 cron:
-  cleanup: '*/5 * * * *'
+  cleanup: '*/1 * * * *'
   check: '*/15 * * * *'
   update-image: '14 2 * * *'