Enable leader election in v1.14+

Use Deployment with leader election instead of StatefulSet

Deployment behaves better when a node gets disconnected
from the rest of the cluster - new provisioner leader
is elected in ~15 seconds, while it may take up to
5 minutes for StatefulSet to start a new replica.

Refer: kubernetes-csi/external-provisioner@52d1fbc

Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>

deploy/rbd/kubernetes/v1.14+/helm/templates/nodeplugin-clusterrolebinding.yaml

@@ -0,0 +1,20 @@
+{{- if .Values.rbac.create -}}
+kind: ClusterRoleBinding
+apiVersion: rbac.authorization.k8s.io/v1
+metadata:
+  name: {{ include "ceph-csi-rbd.nodeplugin.fullname" . }}
+  labels:
+    app: {{ include "ceph-csi-rbd.name" . }}
+    chart: {{ include "ceph-csi-rbd.chart" . }}
+    component: {{ .Values.nodeplugin.name }}
+    release: {{ .Release.Name }}
+    heritage: {{ .Release.Service }}
+subjects:
+  - kind: ServiceAccount
+    name: {{ include "ceph-csi-rbd.serviceAccountName.nodeplugin" . }}
+    namespace: {{ .Release.Namespace }}
+roleRef:
+  kind: ClusterRole
+  name: {{ include "ceph-csi-rbd.nodeplugin.fullname" . }}
+  apiGroup: rbac.authorization.k8s.io          
+{{- end -}}