This enables either deploying without configuring any services, or
temporarily disabling the deploy steps such as will be required
for minor updates where we want to re-run the rolling update outside
of heat.
To deploy directly via ansible-playbook you can do e.g:
openstack overcloud config download --config-dir tmpconfig
cd tmpconfig/tripleo-6b02U7-config
ansible-playbook -vvv -b -i /usr/bin/tripleo-ansible-inventory deploy_steps_playbook.yaml
Which will run the same ansible steps as we normally run via heat.
Change-Id: I59947b67523dfcc43d454d4ac7d82b06804cf71d
ec58a4b6c5