a little ansible clean up, putting templates in their place

Change-Id: Ib5fd9778d55771d3c440bce2c5361800fd3ccaf4
diff --git a/roles/head-node/tasks/main.yml b/roles/head-node/tasks/main.yml
index 68923ce..1d85d03 100644
--- a/roles/head-node/tasks/main.yml
+++ b/roles/head-node/tasks/main.yml
@@ -60,7 +60,7 @@
 - name: Ensure Compute and Switch Node Playbooks
   become: yes
   template:
-    src=templates/{{ item }}
+    src={{ item }}.j2
     dest=/etc/maas/ansible/{{ item }}
     owner=maas
     group=maas