#372 use period timespan to decide when client can make requests again (#404)

test/Ocelot.AcceptanceTests/Steps.cs

@@ -183,6 +183,11 @@ namespace Ocelot.AcceptanceTests
             _ocelotClient = _ocelotServer.CreateClient();
         }
 
+        internal void GivenIWait(int wait)
+        {
+            Thread.Sleep(wait);
+        }
+
         public void GivenOcelotIsRunningWithMiddleareBeforePipeline<T>(Func<object, Task> callback)
         {
             _webHostBuilder = new WebHostBuilder();