Implement clouds.yaml on test hosts

In order to allow us to make use of the Ansible shade
modules to interact with the running OpenStack environment
in tests, we execute the openstack_openrc role against
the test host.

The include_vars for the follow-on play is moved to make
it easier to find, and the initial play's 'pre_tasks' are
renamed to 'tasks' as there is no 'roles' implementation
in the play.

Change-Id: Iec4f266324d4e5f81d21163f68f8d5c32c34f86d

test-prepare-host.yml

@@ -18,7 +18,9 @@
 - name: Playbook for configuring hosts
   hosts: localhost
   become: true
-  pre_tasks:
+  vars_files:
+    - test-vars.yml
+  tasks:
     - include: "common-tasks/test-set-nodepool-vars.yml"
     - name: Clear iptables rules
       shell: "{{ playbook_dir }}/iptables-clear.sh"
@@ -48,12 +50,18 @@
     - name: Use present for package_state on CentOS and openSUSE
       set_fact:
         package_state: "{{ (ansible_pkg_mgr in ['dnf', 'yum', 'zypper']) | ternary('present', 'latest') }}"
+    - name: Setup clouds.yaml
+      include_role:
+        name: openstack_openrc
+        private: yes
 
 - include: test-install-openstack-hosts.yml
 
 - name: Playbook for configuring the LXC host
   hosts: localhost
   become: true
+  vars_files:
+    - test-vars.yml
   roles:
     - role: "lxc_hosts"
       lxc_net_address: 10.100.100.1
@@ -218,6 +226,3 @@
       command: /usr/local/bin/lxc-system-manage iptables-create
       tags:
         - skip_ansible_lint
-
-  vars_files:
-    - test-vars.yml