Pull images from tarballs.openstack.org site[0] when there is no
Depends-On in current commit message.
[0] http://tarballs.openstack.org/kolla/images/
Change-Id: I2e5d4d7ed6418624494121e0a530ec95fd045970
* use become instead of sudo
* use file instead of shell to change file modes
* rename setup_nodes.yml to playbook-setup-nodes.yml
Change-Id: I69eda1f034b97d13be76efc91458b6d762c76baf