install directly on head node

Change-Id: I861fda9725acbc222337f232ca0ffb2c1742e44c
diff --git a/cord-head-playbook.yml b/cord-head-playbook.yml
index 8a821cf..5f1a401 100644
--- a/cord-head-playbook.yml
+++ b/cord-head-playbook.yml
@@ -50,11 +50,11 @@
 - name: Set up VM's, juju, start ONOS and XOS
   hosts: head
   roles:
-    - xos-vm-install
+    - xos-install
     - onos-vm-install
     - juju-setup
     - docker-compose
-    - xos-start
+    - xos-head-start
 
 - name: Set up Automated Compute Node Provisioning
   hosts: head