LTC: attempt Stop when test fails
LTC: attempt Stop when test fails

this may provoke hangs, but what currently happens is that
a failed test triggers leaktest for all tests after it,
which is worse.

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