Add error handler as options to all the API

[doanduyhai]

1. Define an interface AchillesErrorHandler like:

public interface AchillesErrorHandler {

    // Process exception here. 
    Object onError(Exception exception); 
}

Example of usage:

entityManager
.insert(entity)
.withErrorHandlers(myHandler1,myHandler2)
.execute();

[doanduyhai]

We can also extend this concept to provide successHandler too, to return tracing results if it is activated