On startup, start scenes after we're set up all local scenes, rather than starting scenes before others have been created.

This aims to avoid a race condition where scenes could look to inform neighbours that they were up before those neighbours had been created.
http://opensimulator.org/mantis/view.php?id=6618

OpenSim/ApplicationPlugins/RemoteController/RemoteAdminPlugin.cs

@@ -700,6 +700,7 @@ namespace OpenSim.ApplicationPlugins.RemoteController
 
                 IScene newScene;
                 m_application.CreateRegion(region, out newScene);
+                newScene.Start();
 
                 // If an access specification was provided, use it.
                 // Otherwise accept the default.