Check for dummy kernel module (#7348)

The dummy module is needed for nodelocaldns.

roles/kubernetes/preinstall/tasks/0080-system-configurations.yml

@@ -89,3 +89,10 @@
     - { name: kernel.panic, value: 10 }
     - { name: kernel.panic_on_oops, value: 1 }
   when: kubelet_protect_kernel_defaults|bool
+
+- name: Check dummy module
+  modprobe:
+    name: dummy
+    state: present
+    params: 'numdummies=0'
+  when: enable_nodelocaldns