Stub out zuul_reconfigure playbook

This is going to require some work to port several puppet things
to Ansible.  To test the execution mechanism, let's just stub it
out for now.

Change-Id: Ief09ca30b19afffd106c98018cb23a9715fc9a69

playbooks/zuul_reconfigure.yaml

@@ -1,7 +1,10 @@
 - hosts: 'zuul-scheduler:!disabled'
   any_errors_fatal: true
   tasks:
-    - name: Reconfigure the zuul scheduler
+    - name: Say hello
-      command: /usr/local/bin/zuul-scheduler full-reconfigure
+      debug:
-      become: true
+        msg: Hello world!
-      become_user: root
+    # - name: Reconfigure the zuul scheduler
+    #   command: /usr/local/bin/zuul-scheduler full-reconfigure
+    #   become: true
+    #   become_user: root