Run functional devstack job on ansible collection

Porting of job that was running on patches in Ansible.

Change-Id: Ifa5a6b40d6a0f1de9f2cbc917a55c2d0e8ac421d

ci/roles/keystone_domain/tasks/main.yml

@@ -0,0 +1,19 @@
+---
+- name: Create keystone domain
+  openstack.cloud.os_keystone_domain:
+     cloud: "{{ cloud }}"
+     state: present
+     name: "{{ domain_name }}"
+     description: "test description"
+
+- name: Update keystone domain
+  openstack.cloud.os_keystone_domain:
+     cloud: "{{ cloud }}"
+     name: "{{ domain_name }}"
+     description: "updated description"
+
+- name: Delete keystone domain
+  openstack.cloud.os_keystone_domain:
+     cloud: "{{ cloud }}"
+     state: absent
+     name: "{{ domain_name }}"