cache: lru: fix racy on ref counter; and subtract lru size right away after a node removed from lru list
cache: lru: fix racy on ref counter; and subtract lru size right away after a node removed from lru list

rentongzhang/goleveldb,trigrass2/goleveldb,ngaut/goleveldb,hustbill/goleveldb,no2key/goleveldb,conseweb/goleveldb,btcsuite/goleveldb,zzl0/goleveldb,chai2010/goleveldb,syndtr/goleveldb,FactomProject/goleveldb