Avoid spamming the console with "Connection refused" when elasticsearch connection is not available

[teosarca]

Stacktrace:

2017-05-12 20:08:59.918  INFO 8944 [                ][          ] --- [][generic][T#2]] org.elasticsearch.client.transport       : [Tana Nile] failed to connect to node [{#transport#-1}{127.0.0.1}{127.0.0.1:9300}], removed from nodes list

org.elasticsearch.transport.ConnectTransportException: [][127.0.0.1:9300] connect_timeout[30s]
	at org.elasticsearch.transport.netty.NettyTransport.connectToChannelsLight(NettyTransport.java:967)
	at org.elasticsearch.transport.netty.NettyTransport.connectToNode(NettyTransport.java:933)
	at org.elasticsearch.transport.netty.NettyTransport.connectToNodeLight(NettyTransport.java:906)
	at org.elasticsearch.transport.TransportService.connectToNodeLight(TransportService.java:267)
	at org.elasticsearch.client.transport.TransportClientNodesService$SimpleNodeSampler.doSample(TransportClientNodesService.java:390)
	at org.elasticsearch.client.transport.TransportClientNodesService$NodeSampler.sample(TransportClientNodesService.java:336)
	at org.elasticsearch.client.transport.TransportClientNodesService$ScheduledNodeSampler.run(TransportClientNodesService.java:369)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)
Caused by: java.net.ConnectException: Connection refused: no further information: localhost/127.0.0.1:9300
	at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
	at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)
	at org.jboss.netty.channel.socket.nio.NioClientBoss.connect(NioClientBoss.java:152)
	at org.jboss.netty.channel.socket.nio.NioClientBoss.processSelectedKeys(NioClientBoss.java:105)
	at org.jboss.netty.channel.socket.nio.NioClientBoss.process(NioClientBoss.java:79)
	at org.jboss.netty.channel.socket.nio.AbstractNioSelector.run(AbstractNioSelector.java:337)
	at org.jboss.netty.channel.socket.nio.NioClientBoss.run(NioClientBoss.java:42)
	at org.jboss.netty.util.ThreadRenamingRunnable.run(ThreadRenamingRunnable.java:108)
	at org.jboss.netty.util.internal.DeadLockProofWorker$1.run(DeadLockProofWorker.java:42)
	... 3 common frames omitted

[teosarca]

tested locally, works.