fix to close MVCCGarbageCollect iterator
fix to close MVCCGarbageCollect iterator

marcuswestin/cockroach,il9ue/cockroach,il9ue/cockroach,arjun4084346/cockroach,il9ue/cockroach,paperstreet/cockroach,veteranlu/cockroach,il9ue/cockroach,glycerine/cockroach,bg451/cockroach,bg451/cockroach,arjun4084346/cockroach,veteranlu/cockroach,sunya123/cockroach,arjun4084346/cockroach,nieyy/cockroach,cuongdo/cockroach,maxlang/cockroach,paperstreet/cockroach,veteranlu/cockroach,vivekmenezes/cockroach,cuongdo/cockroach,paperstreet/cockroach,maxlang/cockroach,cuongdo/cockroach,mbertschler/cockroach,petermattis/cockroach,glycerine/cockroach,arjun4084346/cockroach,mbertschler/cockroach,nieyy/cockroach,glycerine/cockroach,vaibhavarora/cockroach,petermattis/cockroach,petermattis/cockroach,marcuswestin/cockroach,maxlang/cockroach,marcuswestin/cockroach,cockroachdb/cockroach,vivekmenezes/cockroach,paperstreet/cockroach,arjun4084346/cockroach,cockroachdb/cockroach,paperstreet/cockroach,sunya123/cockroach,paperstreet/cockroach,mbertschler/cockroach,petermattis/cockroach,vivekmenezes/cockroach,marcuswestin/cockroach,vivekmenezes/cockroach,cockroachdb/cockroach,vaibhavarora/cockroach,veteranlu/cockroach,il9ue/cockroach,bg451/cockroach,cuongdo/cockroach,veteranlu/cockroach,maxlang/cockroach,maxlang/cockroach,marcuswestin/cockroach,petermattis/cockroach,glycerine/cockroach,paperstreet/cockroach,glycerine/cockroach,veteranlu/cockroach,bg451/cockroach,bg451/cockroach,vaibhavarora/cockroach,arjun4084346/cockroach,sunya123/cockroach,sunya123/cockroach,glycerine/cockroach,vaibhavarora/cockroach,sunya123/cockroach,maxlang/cockroach,cuongdo/cockroach,nieyy/cockroach,mbertschler/cockroach,mbertschler/cockroach,cockroachdb/cockroach,cuongdo/cockroach,vivekmenezes/cockroach,nieyy/cockroach,petermattis/cockroach,sunya123/cockroach,sunya123/cockroach,il9ue/cockroach,nieyy/cockroach,bg451/cockroach,petermattis/cockroach,vaibhavarora/cockroach,vaibhavarora/cockroach,maxlang/cockroach,vivekmenezes/cockroach,cockroachdb/cockroach,marcuswestin/cockroach,cockroachdb/cockroach,bg451/cockroach,marcuswestin/cockroach,sunya123/cockroach,cuongdo/cockroach,cockroachdb/cockroach,nieyy/cockroach,paperstreet/cockroach,mbertschler/cockroach,nieyy/cockroach,marcuswestin/cockroach,glycerine/cockroach,nieyy/cockroach,vaibhavarora/cockroach,vaibhavarora/cockroach,arjun4084346/cockroach,petermattis/cockroach,mbertschler/cockroach,vivekmenezes/cockroach,veteranlu/cockroach,glycerine/cockroach,veteranlu/cockroach,cockroachdb/cockroach,cuongdo/cockroach,vivekmenezes/cockroach,arjun4084346/cockroach,il9ue/cockroach,maxlang/cockroach,il9ue/cockroach