Allow Sonarr and Radarr to run together.

Also changes default port of Radarr to 7878.
However, now multiple instances of Radarr can also be run. This should
be fixed in the future.

src/NzbDrone.Automation.Test/AutomationTest.cs

@@ -40,7 +40,7 @@ namespace NzbDrone.Automation.Test
             _runner.KillAll();
             _runner.Start();
 
-            driver.Url = "http://localhost:8989";
+            driver.Url = "http://localhost:7878";
 
             var page = new PageBase(driver);
             page.WaitForNoSpinner();