Merge branch 'downgrade_module_2_9' into 'master'

changing from namespace annotation back to something compatible to ansible 2.9

See merge request !574

roles/upgrade/tasks/main.yml

@@ -16,7 +16,7 @@
       when: services["lustre-client.service"] is defined
 
     - name: ensure the lustre module is absent
-      community.general.modprobe:
+      modprobe:
         name: lustre
         state: absent
       become: true