Stresstest command improvements

The following additional features would be useful to users of the stresstest command:

• Have the stresstest command run deterministic scenarios and check that the state of the chain is consistent with the injected operations, returning eg
  • percentage of transactions applied/error if not all transactions are applied (--max-loss-rate [0;1])
  • statistics on dt between injection and block timestamp in which op is included
  • other ideas?
• Hit multiple nodes simultaneously