Implement image fetcher feature

Sync nsx.vmware.com/node-id annotation of subnetport with nsx-t.
Sync wcp.vmware.com/image-fetcher: "true" and namespace_uid label of subnetport with tags of nsx-t.

Signed-off-by: Xie Zheng <xizheng@vmware.com>

pkg/controllers/subnetport/subnetport_controller.go

@@ -171,8 +171,8 @@ func (r *SubnetPortReconciler) SetupWithManager(mgr ctrl.Manager) error {
 				MaxConcurrentReconciles: common.NumReconcile(),
 			}).
 		Watches(&vmv1alpha1.VirtualMachine{},
-			handler.EnqueueRequestsFromMapFunc(r.vmMapFunc),
-			builder.WithPredicates(predicate.LabelChangedPredicate{})).
+				handler.EnqueueRequestsFromMapFunc(r.vmMapFunc),
+				builder.WithPredicates(predicate.LabelChangedPredicate{})).
 		Complete(r) // TODO: watch the virtualmachine event and update the labels on NSX subnet port.
 }