Mounting is not allowed if hostname is passed in payload in <host> field.

Logs:

07:24:45.492 ERROR [opendaylight-cluster-data-notification-dispatcher-56] member-1-shard-topology-config: Error notifying listener org.opendaylight.mdsal.binding.dom.adapter.BindingClusteredDOMDataTreeChangeListenerAdapter@8a00d20
java.lang.NullPointerException: null
at java.util.Objects.requireNonNull(Objects.java:221) ~[?:?]
at org.opendaylight.netconf.topology.singleton.impl.NetconfTopologyManager.startNetconfDeviceContext(NetconfTopologyManager.java:186) ~[?:?]
at org.opendaylight.netconf.topology.singleton.impl.NetconfTopologyManager.onDataTreeChanged(NetconfTopologyManager.java:159) ~[?:?]
at org.opendaylight.mdsal.binding.dom.adapter.BindingDOMDataTreeChangeListenerAdapter.onDataTreeChanged(BindingDOMDataTreeChangeListenerAdapter.java:37) ~[bundleFile:?]
at org.opendaylight.controller.cluster.datastore.DataTreeChangeListenerActor.dataTreeChanged(DataTreeChangeListenerActor.java:84) ~[bundleFile:?]
at org.opendaylight.controller.cluster.datastore.DataTreeChangeListenerActor.handleReceive(DataTreeChangeListenerActor.java:45) ~[bundleFile:?]
at akka.japi.pf.UnitCaseStatement.apply(CaseStatements.scala:24) [bundleFile:?]
at akka.japi.pf.UnitCaseStatement.apply(CaseStatements.scala:20) [bundleFile:?]
at scala.PartialFunction.applyOrElse(PartialFunction.scala:189) [bundleFile:?]
at scala.PartialFunction.applyOrElse$(PartialFunction.scala:188) [bundleFile:?]
at akka.japi.pf.UnitCaseStatement.applyOrElse(CaseStatements.scala:20) [bundleFile:?]
at scala.PartialFunction$OrElse.applyOrElse(PartialFunction.scala:244) [bundleFile:?]
at scala.PartialFunction$OrElse.applyOrElse(PartialFunction.scala:245) [bundleFile:?]
at akka.actor.Actor.aroundReceive(Actor.scala:537) [bundleFile:?]
at akka.actor.Actor.aroundReceive$(Actor.scala:535) [bundleFile:?]
at akka.actor.AbstractActor.aroundReceive(AbstractActor.scala:220) [bundleFile:?]
at akka.actor.ActorCell.receiveMessage(ActorCell.scala:580) [bundleFile:?]
at akka.actor.ActorCell.invoke(ActorCell.scala:548) [bundleFile:?]
at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:270) [bundleFile:?]
at akka.dispatch.Mailbox.run(Mailbox.scala:231) [bundleFile:?]
at akka.dispatch.Mailbox.exec(Mailbox.scala:243) [bundleFile:?]
at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:290) [?:?]
at java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1020) [?:?]
at java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1656) [?:?]
at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1594) [?:?]
at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:183) [?:?]