title: Xamarin UI Test iOS Simulator Connection refused
body: <p>I am trying to use Xamarin.UITest locally, but I am getting a httprequest exception, saying that the connection has been refused
  I am using xcode 9.3, vs 7.4.2 and an iphone 10.3 iphone x sim
  Xamarin.Ui.Test 2.2.4, Xamarin.Testcloud.Agent 0.21.4, NUnit 3.10.1
  When Trying to run my test I get the following Exception:</p>
  
  <p>Xamarin.UITest.XDB.Exceptions.DeviceAgentException : DeviceAgent start session failed: An error occurred while sending the request
   ----> System.Net.Http.HttpRequestException : An error occurred while sending the request
   ----> System.Net.WebException : Error: ConnectFailure (Connection refused)
   ----> System.Net.Sockets.SocketException : Connection refused</p>