Fix multi-spectator test updating state after removing user

Removing user triggers `playingUsers.Remove`, but doing so before
updating the state leads to `EndGameplay` being called with `State ==
Playing` rather than `Quit`.

osu.Game.Tests/Visual/Multiplayer/TestSceneMultiSpectatorScreen.cs

@@ -432,8 +432,8 @@ private void end(int userId)
             {
                 var user = playingUsers.Single(u => u.UserID == userId);
 
-                OnlinePlayDependencies.MultiplayerClient.RemoveUser(user.User.AsNonNull());
                 SpectatorClient.SendEndPlay(userId);
+                OnlinePlayDependencies.MultiplayerClient.RemoveUser(user.User.AsNonNull());
 
                 playingUsers.Remove(user);
             });