Merge "Unify jinja syntax"

ansible/roles/ceilometer/tasks/bootstrap.yml

ansible/roles/ceph/tasks/reconfigure.yml

ansible/roles/cinder/tasks/start.yml

ansible/roles/cloudkitty/templates/cloudkitty.conf.j2

ansible/roles/congress/tasks/bootstrap_service.yml

ansible/roles/congress/tasks/start.yml

ansible/roles/magnum/templates/magnum.conf.j2

ansible/roles/mistral/tasks/bootstrap_service.yml

ansible/roles/mistral/tasks/start.yml

ansible/roles/nova/tasks/external-ceph.yml

ansible/roles/nova/templates/nova.conf.j2

ansible/roles/panko/tasks/bootstrap.yml

ansible/roles/swift/templates/swift-rsyncd.json.j2

ansible/roles/trove/templates/trove-taskmanager.conf.j2

ansible/roles/watcher/templates/watcher.conf.j2