Compensate for different server pool sizes (#14968)
Compensate for different server pool sizes (#14968)

When a server pool with a different number of sets is added they are 
not compensated when choosing a destination pool for new objects. 
This leads to the unbalanced placement of objects with smaller pools 
getting a bigger number of objects since we only compare the destination 
sets directly.

This change will compensate for differences in set sizes when choosing
the destination pool.

Different set sizes are already compensated by fewer disks.
donatello/minio,balamurugana/minio,minio/minio,krisis/minio,krisis/minio,vadmeste/minio,vadmeste/minio,donatello/minio,minio/minio,balamurugana/minio