Add subdomain var to userdata (#8969)

ansible/roles_ocp_workloads/ocp4_workload_devops_roadshow/tasks/workload.yml

@@ -168,6 +168,7 @@
       user: "user{{ n }}"
       usernum: "{{ n }}"
       password: "{{ ocp4_workload_authentication_htpasswd_user_password }}"
+      subdomain: "{{ sub_domain }}"
   loop: "{{ range(1, num_users | int + 1) | list }}"
   loop_control:
     loop_var: n