Fix a lock leak on error in ChangeReplicas.
Fix a lock leak on error in ChangeReplicas.

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