Fix issue with i40e driver install failing

Change-Id: Ic0c4ebed423f106af4df0a9be1fc1051cd35cd93
(cherry picked from commit 790ef936a049237b2d1eb10e1ad640b3b2f405e8)
diff --git a/roles/head-node/templates/compute-node.yml.j2 b/roles/head-node/templates/compute-node.yml.j2
index 13d71e7..92c2684 100644
--- a/roles/head-node/templates/compute-node.yml.j2
+++ b/roles/head-node/templates/compute-node.yml.j2
@@ -9,6 +9,5 @@
 - name: Configure compute hosts to use DNS server
   hosts: all
   remote_user: ubuntu
-  become: yes
   roles:
     - role: compute-node