Add zuul_reconfigure playbook

Reconfigure a running zuul-scheduler.

Change-Id: I21f16c221903ccd9b726a091c3acf3e755788263

playbooks/zuul_reconfigure.yaml

@@ -0,0 +1,7 @@
+- hosts: 'zuul01.openstack.org'
+  any_errors_fatal: true
+  tasks:
+    - name: Reconfigure the zuul scheduler
+      command: /usr/local/bin/zuul-scheduler full-reconfigure
+      become: true
+      become_user: root