Add support for k8s v1.16.0-beta.2 (#5148)

Cleaned up deprecated APIs:
apps/v1beta1
apps/v1beta2
extensions/v1beta1 for ds,deploy,rs

Add workaround for deploying helm using incompatible
deployment manifest.
Change-Id: I78b36741348f47a999df3841ee63cf4e6f377830

contrib/network-storage/heketi/roles/provision/templates/glusterfs-daemonset.json.j2

@@ -1,6 +1,6 @@
 {
     "kind": "DaemonSet",
-    "apiVersion": "extensions/v1beta1",
+    "apiVersion": "apps/v1",
     "metadata": {
         "name": "glusterfs",
         "labels": {

contrib/network-storage/heketi/roles/provision/templates/heketi-bootstrap.json.j2

@@ -30,7 +30,7 @@
     },
     {
       "kind": "Deployment",
-      "apiVersion": "extensions/v1beta1",
+      "apiVersion": "apps/v1",
       "metadata": {
         "name": "deploy-heketi",
         "labels": {

contrib/network-storage/heketi/roles/provision/templates/heketi-deployment.json.j2

@@ -44,7 +44,7 @@
     },
     {
       "kind": "Deployment",
-      "apiVersion": "extensions/v1beta1",
+      "apiVersion": "apps/v1",
       "metadata": {
         "name": "heketi",
         "labels": {