Elevated privileges required to set owner/group/mode by ansible

Elevated (root) privileges are required to set owner/group/mode when
target owner does not math the user running Ansible. Without it the
playbook fails with 'Permission denied' error.

Change-Id: Ie7455a5f1ed709dfb9c9d7c653c6f808c00af4c2

ansible/roles/ovs-dpdk/tasks/config.yml

 ---
 - name: Ensuring config directories exist
+  become: True
   file:
     path: "{{ node_config_directory }}/{{ item.key }}"
     state: "directory"