starting a cluster node when seed node is down error

[ronenhamias]

i will be good not to force initialization of the cluster order

if nodeA is seed node and nodeB looks on nodeA as seed node
it should be possible to start nodeB and then nodeA or nodeA and then nodeB

currently exception is thrown

Exception in thread "main" java.lang.NullPointerException
at com.google.common.base.Preconditions.checkNotNull(Preconditions.java:210)
at com.google.common.util.concurrent.AbstractFuture.setException(AbstractFuture.java:200)
at com.google.common.util.concurrent.SettableFuture.setException(SettableFuture.java:68)
at io.servicefabric.transport.TransportChannel.send(TransportChannel.java:101)
at servicefabric.cluster.examples.ClusterNodeB.main(ClusterNodeB.java:26)