Add MaxPlayerPerRoom for BC and DS

Add MaxPlayerPerRoom for BC and DS, we had it in devil square before, now it is limited to 10 (same as BC). Make it so users can enter the event as many as we want. People were asking to increase BC limit of 10 to higher but instead DS higher limit was reduced to 10.

I don't know the limitation of game client or gameservers but I think we all agree that we want more players to join the events at the same time, instead having to open multiples market servers.