In zuul, roles can be easily included cross repos, while playbooks need
to be replicated and copied.
This change creates three roles roles, and move tasks to be included in
the new roles, so the playbooks are just minimal, and replicating them
is not a problem since the logic is in roles that are included
The common variables are loaded in the role common, the node preparation
i moved to the prepare-node role, and it's now called in the pre,yaml
playbook in pre-run.
run-test role contains the rendering of bash scripts and effective test
run
Taiga-id: https://tree.taiga.io/project/tripleo-ci-board/task/112
Change-Id: Ie51fcfbee79727d04fca47d26a5ed8ad44ed3bf6
9206748e9d