Merge "Implement Ansible rally role"

ansible/group_vars/all.yml

ansible/inventory/all-in-one

ansible/inventory/multinode

ansible/roles/rally/defaults/main.yml

ansible/roles/rally/meta/main.yml

ansible/roles/rally/tasks/bootstrap.yml

ansible/roles/rally/tasks/bootstrap_service.yml

ansible/roles/rally/tasks/config.yml

ansible/roles/rally/tasks/deploy.yml

ansible/roles/rally/tasks/do_reconfigure.yml

ansible/roles/rally/tasks/main.yml

ansible/roles/rally/tasks/pull.yml

ansible/roles/rally/tasks/reconfigure.yml

ansible/roles/rally/tasks/start.yml

ansible/roles/rally/tasks/upgrade.yml

ansible/roles/rally/templates/rally.conf.j2

ansible/roles/rally/templates/rally.json.j2

ansible/site.yml

docker/rally/extend_start.sh

etc/kolla/globals.yml