ceph: add volume replication cr yaml

Add a new yaml for creating volume replicationclass
and volume replication cr.

Signed-off-by: Yug Gupta <yuggupta27@gmail.com>

cluster/examples/kubernetes/ceph/volume-replication-class.yaml

@@ -0,0 +1,12 @@
+apiVersion: replication.storage.openshift.io/v1alpha1
+kind: VolumeReplicationClass
+metadata:
+  name: rbd-volumereplicationclass
+spec:
+  provisioner: rook-ceph.rbd.csi.ceph.com
+  parameters:
+    mirroringMode: snapshot
+    schedulingInterval: "12m"
+    schedulingStartTime: "16:18:43"
+    replication.storage.openshift.io/replication-secret-name: rook-csi-rbd-provisioner
+    replication.storage.openshift.io/replication-secret-namespace: rook-ceph

cluster/examples/kubernetes/ceph/volume-replication.yaml

@@ -0,0 +1,11 @@
+apiVersion: replication.storage.openshift.io/v1alpha1
+kind: VolumeReplication
+metadata:
+  name: pvc-volumereplication
+spec:
+  volumeReplicationClass: rbd-volumereplicationclass
+  replicationState: primary
+  dataSource:
+    apiGroup: ""
+    kind: PersistentVolumeClaim
+    name: rbd-pvc # Name of the PVC on which mirroring is to be enabled.