Remember where we are in the commit list for recovery

We keep track of where the coordinator is in the list of resources to commit during doCommit, so that we can avoid heuristics as much as possible. Basically we need to remember if we have gotten past the first participant. However, we do not remember this value (boolean) as part of the transaction state. This means that upon recovery there is a chance that a participant that failed to commit the first time round and then causes a heuristic rollback subsequently, will cause the transaction silently mask the heuristic and roll back all of the other participants, delete the log and report a normal transaction abort state. In fact it should ensure the heuristic is raised.