Add a verification step for scaling down node pools

Author: xenolinux

modules/scale-down-data-plane.adoc

@@ -88,3 +88,12 @@ $ oc scale nodepool/<NODEPOOL_NAME> --namespace <HOSTED_CLUSTER_NAMESPACE> --rep
 ----
 +
 After rescaling the `NodePool` resource,  wait for couple of minutes for the `NodePool` resource to become available in a `Ready` state.
+
+.Verification
+
+* Verify that the value for the `nodeDrainTimeout` field is greater than `0s` by running the following command:
++
+[source,terminal]
+----
+$ oc get nodepool -n <hosted_cluster_namespace> <nodepool_name> -ojsonpath='{.spec.nodeDrainTimeout}'
+----