Add utility script to disable ansible

Touching the file works, but it's easy to misspell.

Change-Id: I4980ac2c290abd6cda39846e651fb490bfafe96f

playbooks/roles/install-ansible/tasks/main.yaml

@@ -111,6 +111,14 @@
     src: roles/
     dest: /etc/ansible/roles
 
+- name: Copy disable-ansible utility script in place
+  copy:
+    src: disable-ansible
+    dest: /usr/local/bin/disable-ansible
+    mode: 0755
+    owner: root
+    group: root
+
 - name: Make sure k8s-on-openstack repo is up to date
   git:
     repo: https://github.com/infraly/k8s-on-openstack