title: Camel SFTP can't establish connection
body: <p>I have the SFTP server up in one docker container available at localhost:2222 with user user/pass
  Trying to establish connection in other one via camel 2.22.0 route like</p>
  
  <pre><code>  from("sftp:user@localhost:2222/sftp/in?password=pass"))
     .log("${file:name}");
  </code></pre>
  
  <p>But cannot connect because of </p>
  
  <pre><code>  Error auto creating directory:/sftp/in due Cannot connect to sftp://user@localhost:2222. This exception is ignored.
  
  org.apache.camel.component.file.GenericFileOperationFailedException: Cannot connect to sftp://pms@localhost:2222
  at org.apache.camel.component.file.remote.SftpOperations.connect(SftpOperations.java:144)
  at org.apache.camel.component.file.remote.RemoteFileConsumer.connectIfNecessary(RemoteFileConsumer.java:233)
  
  Caused by: com.jcraft.jsch.JSchException: java.net.ConnectException: Connection refused (Connection refused)
  at com.jcraft.jsch.Util.createSocket(Util.java:394)
  </code></pre>
  
  <p>Got that after moving from camel 2.18.2 to camel 2.22.0.
  Is it possible to fix?</p>