Lay out a clouds.yaml file before upgrading

Upgrades use the clouds.yaml instead of environment variables
to test APIs. Swift doesn't have openstack_openrc in meta, and
no role that applies to localhost in the whole functional test
path has it. So we have to include openstack_openrc role.

Change-Id: I5196ab338659c65a6a3b7ac03095bbfb1e26c0a8

tests/ansible-role-requirements.yml

@@ -49,4 +49,4 @@
 - name: os_previous_swift
   src: https://git.openstack.org/openstack/openstack-ansible-os_swift
   scm: git
-  version: stable/pike
+  version: stable/queens

tests/test-swift-resources-upgrade.yml

@@ -27,6 +27,9 @@
       - "python-glanceclient"
       - "openstacksdk"
   tasks:
+    - name: Generate clouds.yaml for API testing
+      include_role:
+        name: "openstack_openrc"
     - name: Install openstack sdk
       pip:
         name: "{{ upgrade_test_packages }}"