Turn off Ansible host fact gathering

We don't appear to use host facts, so turning off fact gathering can
help avoid unnecessary work:

  http://docs.ansible.com/ansible/intro_configuration.html#gathering
  http://docs.ansible.com/ansible/playbooks_variables.html#turning-off-facts

Change-Id: I8ddc143b89c406730443ad914a5ccd5253a2a96f
1 file changed