Comment 8 for bug 1708115

Slight change in the proposal:

With the help of a utility function in https://review.openstack.org/#/c/491749/ (python-tripleoclient) we can use the upgrade_tasks playbook generated by the tripleo-heat-templates at https://review.openstack.org/#/c/490848/ (note: this depends on a few shardy tht reviews see shortlog).

So, in the upgrade-non-controller.sh script, we add download and execution of both the upgrade_tasks and deploy_steps playbooks with https://review.openstack.org/#/c/490847/ (tripleo-common).

The generated playbooks look like https://paste.fedoraproject.org/paste/gUi5Ckq2qoTT~ed5kItxRw/raw (while it lasts)... seems like most of the things we need for the compute and swift nodes are in the ugprade_tasks (e.g. stop openstack-nova-compute which we had to add recently into the tripleo_upgrade_node.sh).

Reviews:
     (tripleo-common): https://review.openstack.org/#/c/490847/ "Download and run upgrade/deploy_steps_playbooks for upgrade"
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     |Depends-On:
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     -->(tripleo-heat-templates): https://review.openstack.org/#/c/490848/ "Also write an upgrade_(batch)_tasks playbook" (&see shortlog!)
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        |Depends-On:
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        -->(python-tripleo-client): https://review.openstack.org/#/c/491749/ "Adds when in upgrade_tasks playbook written by config download"