Radosław Piliszek 8a543098d6 CI: clean up requirements installation
We install kolla-ansible requirements in Zuul's Ansible playbooks.
This patch cleans up the installation in scripts so that they are
only concerned with auxiliary requirements:
- ansible (since we do not track it in requirements)
- ara (for log summaries)
- openstack clients (for first init and tests after deployment)

Additionally this patch installs openstack clients in a separate
virtualenv.
Note that all kolla-ansible requirements, ansible and ara are still
installed system-wide.

Change-Id: Iac04082ad39a9d823c515ba11c5db9af50ed225f
Signed-off-by: Radosław Piliszek <radoslaw.piliszek@gmail.com>
2019-07-16 20:43:22 +02:00
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