Support playing multiple games at the same time with same userId

[greenjoe]

While it is not possible to join queue multiple times with the same userId, it is possible to be playing multiple games.
It has to be done on different socket connections so that the messages are not mixed.

As soon as one game is started, another socket instance can join a queue to start a new game.

User should be able to specify how many games can be played at the same time.