Fix policy controller

'etcd_cert_dir' variable is missing from 'kubernetes-apps/ansible'
role which breaks Calico policy controller deployment.

Also fixing calico-policy-controller.yml.

roles/kubernetes-apps/ansible/templates/calico-policy-controller.yml.j2

@@ -44,12 +44,11 @@ spec:
             # This removes the need for KubeDNS to resolve the Service.
             - name: CONFIGURE_ETC_HOSTS
               value: "true"
-    volumeMounts:
-    - mountPath: {{ etcd_cert_dir }}
-      name: etcd-certs
-      readOnly: true
-  volumes:
-  - hostPath:
-      path: {{ etcd_cert_dir }}
-    name: etcd-certs
-
+          volumeMounts:
+          - mountPath: {{ etcd_cert_dir }}
+            name: etcd-certs
+            readOnly: true
+      volumes:
+      - hostPath:
+          path: {{ etcd_cert_dir }}
+        name: etcd-certs