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/network_plugin/contiv/templates/contiv-etcd.yml.j2

@@ -29,7 +29,7 @@ spec:
       initContainers:
         - name: contiv-etcd-init
           image: {{ contiv_etcd_init_image_repo }}:{{ contiv_etcd_init_image_tag }}
-          imagePullPolicy: Always
+          imagePullPolicy: {{ k8s_image_pull_policy }}
           env:
             - name: ETCD_INIT_ARGSFILE
               value: '{{ contiv_etcd_conf_dir }}/contiv-etcd-args'