Allow role_assignment module to work cross domain

The role_assignment module always looks up the user, group and project
so to support cross-domain assignments we should add extra parameters
like OSC to look them up from the correct domains. Switch to using
the service proxy interface to grant or revoke the roles as well.

Partial-Bug: #2052448
Partial-Bug: #2047151
Partial-Bug: #2097203
Change-Id: Id023cb9e7017c749bc39bba2091921154a413723

ci/roles/role_assignment/tasks/main.yml

@@ -45,12 +45,6 @@
     state: absent
     user: admin
 
-- name: Delete project
-  openstack.cloud.project:
-     cloud: "{{ cloud }}"
-     state: absent
-     name: ansible_project
-
 - name: Create domain
   openstack.cloud.identity_domain:
      cloud: "{{ cloud }}"
@@ -78,6 +72,7 @@
      state: present
      name: ansible_user
      domain: default
+  register: specific_user
 
 - name: Create user in specific domain
   openstack.cloud.identity_user:
@@ -138,6 +133,45 @@
     that:
       - role_assignment is changed
 
+- name: Assign role to user in specific domain on default domain project
+  openstack.cloud.role_assignment:
+    cloud: "{{ cloud }}"
+    role: anotherrole
+    user: "{{ specific_user.user.id }}"
+    domain: default
+    project: ansible_project
+  register: role_assignment
+
+- name: Assert role assignment
+  assert:
+    that:
+      - role_assignment is changed
+
+- name: Revoke role to user in specific domain
+  openstack.cloud.role_assignment:
+    cloud: "{{ cloud }}"
+    role: anotherrole
+    user: "{{ specific_user.user.id }}"
+    domain: default
+    project: ansible_project
+    state: absent
+  register: role_assignment
+
+- name: Assert role assignment revoked
+  assert:
+    that:
+      - role_assignment is changed
+
+- name: Assign role to user in specific domain on default domain project
+  openstack.cloud.role_assignment:
+    cloud: "{{ cloud }}"
+    role: anotherrole
+    user: ansible_user
+    user_domain: "{{ specific_user.user.domain_id }}"
+    project: ansible_project
+    project_domain: default
+  register: role_assignment
+
 - name: Delete group in default domain
   openstack.cloud.identity_group:
      cloud: "{{ cloud }}"
@@ -171,3 +205,10 @@
      cloud: "{{ cloud }}"
      state: absent
      name: ansible_domain
+
+- name: Delete project
+  openstack.cloud.project:
+     cloud: "{{ cloud }}"
+     state: absent
+     name: ansible_project
+