Add poolsize for checkers
Add poolsize for checkers

The checkermaster will always try to keep the number of running checkers
at that number and launch new ones if new capacity is availabl

fausecteam/ctf-gameserver,fausecteam/ctf-gameserver,fausecteam/ctf-gameserver,fausecteam/ctf-gameserver,fausecteam/ctf-gameserver