Added a flag in statemachine to run all transition and state entry/exit actions in sync while accepting an event.
This will allow the caller ofsendEvent to know if there was any action failure and counter measures can be taken to handle failed execution.

This feature is very useful if we use a spring state machine for an Order use-case whereActions can update to database independently.
Using this flag enables us to make the whole part sending event and execution of actions part of a single transaction.