fix TestReplicaDataIterator Issue #2851
fix TestReplicaDataIterator Issue #2851

- Change the order of two raft log keys.
- Check if there is a tombstone key after destroying a range.

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