deploy attacher sidecar in rbd provisioner sts

currently we are deploying external-attacher
as a seperate statefulset, which leads to
attacher communicating with the node provisoner
daemonset, This PR deploys external-attacher
as a sidecar container inside provisioner
statefulset, so that external-provisioner
always communicates with the plugin responsible
for the provision controller capcabilities.

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

deploy/rbd/kubernetes/csi-rbdplugin-provisioner.yaml

@@ -54,6 +54,18 @@ spec:
           volumeMounts:
             - name: socket-dir
               mountPath: /csi
+        - name: csi-rbdplugin-attacher
+          image: quay.io/k8scsi/csi-attacher:v1.0.1
+          args:
+            - "--v=5"
+            - "--csi-address=$(ADDRESS)"
+          env:
+            - name: ADDRESS
+              value: /csi/csi.sock
+          imagePullPolicy: "IfNotPresent"
+          volumeMounts:
+            - name: socket-dir
+              mountPath: /csi
         - name: csi-rbdplugin
           securityContext:
             privileged: true