[PVE Server] Fix for imbalanced battlegrounds

Because of the population difference and how the queue system works, the current situation on the PVE server for Level 60 battlegrounds is that there are constantly 1 more Alliance playing, except in the (relatively rare) cases where full 10vs10 is achieved.
A typical example is that 6 horde players are queued and 9 alliance, so the game ends up being 6vs7. If 1 more horde then queues at some point during the game, the game is 7vs8.
This gives the higher population faction a permanent advantage and is detrimental to a fair battleground experience.
Therefore I suggest that the battleground queue system is changed to allow only equal number of players in.
A typical example is that 6 horde players are queued and 9 alliance, so the game ends up being 6vs7. If 1 more horde then queues at some point during the game, the game is 7vs8.
This gives the higher population faction a permanent advantage and is detrimental to a fair battleground experience.
Therefore I suggest that the battleground queue system is changed to allow only equal number of players in.