Pool: Fixes EX_OK/EX_RECYCLE detection so that errors are not logged for these
Pool: Fixes EX_OK/EX_RECYCLE detection so that errors are not logged for these

flaviogrossi/billiard,jakirkham/billiard,pombredanne/billiard,jakirkham/billiard,andresriancho/billiard,djsmith42/billiard,pombredanne/billiard,andresriancho/billiard,djsmith42/billiard,flaviogrossi/billiard