apparently for vars to be import you have to have the user as ubuntuw

Change-Id: I05ce9013f77bd6a55f9498c501b79c33381d1103
diff --git a/roles/head-node/files/compute-node.yml b/roles/head-node/files/compute-node.yml
index 94aac38..ba2bd24 100644
--- a/roles/head-node/files/compute-node.yml
+++ b/roles/head-node/files/compute-node.yml
@@ -1,6 +1,7 @@
 ---
 - name: Include vars
   hosts: all
+  remote_user: ubuntu
   tasks:
   - include_vars: vars/compute-node.yml