Add skip: true to disable-puppet-agent

We don't need to do anything on RH as services don't start by default
there.

Change-Id: I38daee0b80006711cb0c4c65aed108ac0c5c215a

playbooks/roles/disable-puppet-agent/tasks/main.yaml

@@ -1,7 +1,10 @@
 - name: Include OS-specific tasks
-  include_tasks: "{{ lookup('first_found', file_list) }}"
+  include_tasks: "{{ item }}"
   vars:
-    file_list: "{{ distro_lookup_path }}"
+    params:
+      files: "{{ distro_lookup_path }}"
+      skip: true
+  loop: "{{ query('first_found', params) }}"
 
 - name: Disable the puppet service
   service: