Added in code to allow control over pull policy for local path provis… (#5334)

* Added in code to allow control over pull policy for local path provisioner

* change to imagePullPolicy to use globally used variable k8s_image_pull_policy

* removed unusued variable from defaults

* updated contiv-etcd and cinder-csi-controllerplugin to use k8s_image_pull_policy variable

roles/kubernetes-apps/csi_driver/cinder/templates/cinder-csi-controllerplugin.yml.j2

@@ -49,7 +49,7 @@ spec:
           env:
             - name: ADDRESS
               value: /var/lib/csi/sockets/pluginproxy/csi.sock
-          imagePullPolicy: Always
+          imagePullPolicy: {{ k8s_image_pull_policy }}
           volumeMounts:
             - mountPath: /var/lib/csi/sockets/pluginproxy/
               name: socket-dir