fix os_user_role for groups in multidomain context

This fixes searching for a group in multi-domain context by passing the
domain_id in the call to get_groups.

original github PR: https://github.com/ansible/ansible/pull/62858

Change-Id: Ia2216728c15cc9d9a5e29bfe6b9fc63d2c6982ce
Task: 38375
Story: 2007209

plugins/modules/os_user_role.py

@@ -156,7 +156,10 @@ def main():
                 module.fail_json(msg="User %s is not valid" % user)
             filters['user'] = u['id']
         if group:
-            g = cloud.get_group(group)
+            if domain:
+                g = cloud.get_group(group, domain_id=filters['domain'])
+            else:
+                g = cloud.get_group(group)
             if g is None:
                 module.fail_json(msg="Group %s is not valid" % group)
             filters['group'] = g['id']