don't re-use batches across txn restarts
don't re-use batches across txn restarts

due to the cached error, that's an infinite loop.
see #3067

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