Update throttle test to reflect new behavior

The "throttling" performed by Farside now redirects to the same instance
as before, rather than outright blocking the connection.

lib/farside/router.ex

@@ -46,8 +46,6 @@ defmodule Farside.Router do
       true ->
         Farside.pick_instance(service)
     end
-    IO.inspect(get_req_header(conn, "throttle"))
-    IO.inspect(instance)
 
     params =
       cond do

test/farside_test.exs

@@ -17,17 +17,22 @@ defmodule FarsideTest do
   end
 
   test "throttle" do
-    :get
-    |> conn("/", "")
-    |> Router.call(@opts)
+    first_conn =
+      :get
+      |> conn("/", "")
+      |> Router.call(@opts)
+
+    first_redirect = elem(List.last(first_conn.resp_headers), 1)
 
     throttled_conn =
       :get
       |> conn("/", "")
       |> Router.call(@opts)
 
+    throttled_redirect = elem(List.last(first_conn.resp_headers), 1)
+
     assert throttled_conn.state == :sent
-    assert throttled_conn.status == 403
+    assert throttled_redirect == first_redirect
   end
 
   test "/" do