Better fix for openstack cinder zone issue using ignore-volume-az option (#2980)

* Better fix for openstack cinder zone issue[1][2]
using ignore-volume-az option[3].
[1]: https://github.com/kubernetes-incubator/kubespray/pull/2155
[2]: https://github.com/kubernetes-incubator/kubespray/pull/2346
[3]: https://github.com/kubernetes/kubernetes/pull/53523

* Remove kube-scheduler-policy.yaml

roles/kubernetes/master/tasks/static-pod-setup.yml

@@ -26,14 +26,6 @@
 
 - meta: flush_handlers
 
-- name: Write kube-scheduler policy file
-  template:
-    src: kube-scheduler-policy.yaml.j2
-    dest: "{{ kube_config_dir }}/kube-scheduler-policy.yaml"
-  notify: Master | Restart kube-scheduler
-  tags:
-    - kube-scheduler
-
 - name: Write kube-scheduler kubeconfig
   template:
     src: kube-scheduler-kubeconfig.yaml.j2