
Ansible built-in variable 'play_hosts' has been deprecated since release 2.2, and replaced by a new 'ansible_play_batch' variable according to the official document below. We should reflect the update to playbook site.yml. link: http://docs.ansible.com/ansible/playbooks_variables.html Change-Id: I937fe93ea893a3469019a0759ec57d2e91e8adab Closes-Bug: #1694650