Fix simple-balancer example

Created by: eiriklv

The balancer example will only work for the first two requests, as the target that is pushed back to addresses has the form:

{
    target: {
        host: 'ws1.0.0.0',
        port: 80
    }
}

when should have the form:

{
    host: 'ws1.0.0.0',
    port: 80
}