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/templates/manifests/kube-scheduler.manifest.j2

@@ -31,10 +31,6 @@ spec:
     - scheduler
     - --leader-elect=true
     - --kubeconfig={{ kube_config_dir }}/kube-scheduler-kubeconfig.yaml
-{% if volume_cross_zone_attachment %}
-    - --use-legacy-policy-config
-    - --policy-config-file={{ kube_config_dir }}/kube-scheduler-policy.yaml
-{% endif %}
     - --profiling={{ kube_profiling }}
     - --v={{ kube_log_level }}
 {% if kube_feature_gates %}
@@ -69,11 +65,6 @@ spec:
     - mountPath: "{{ kube_config_dir }}/kube-scheduler-kubeconfig.yaml"
       name: kubeconfig
       readOnly: true
-{% if volume_cross_zone_attachment %}
-    - mountPath: "{{ kube_config_dir }}/kube-scheduler-policy.yaml"
-      name: kube-scheduler-policy
-      readOnly: true
-{% endif %}
   volumes:
   - name: ssl-certs-host
     hostPath:
@@ -89,8 +80,3 @@ spec:
   - name: kubeconfig
     hostPath:
       path: "{{ kube_config_dir }}/kube-scheduler-kubeconfig.yaml"
-{% if volume_cross_zone_attachment %}
-  - name: kube-scheduler-policy
-    hostPath:
-      path: "{{ kube_config_dir }}/kube-scheduler-policy.yaml"
-{% endif %}