Authenticated subject is not passing properly

[Jaiya94]

Description:
When the session is available and we use prompt login to authenticate again. In the middle of the flow authenticated subject is reset.

Steps to reproduce:

1. Set up 2-factor authentication(Basic and SMSOTP) with adaptive authentication script.
   2.Go through the authentication flow and complete that.
2. Again go through the authentication flow in the same browser. (In OB flows we send the prompt = login parameter because we need the user to be authenticated in even the session is there) Then when debugging we were able to see that when trying to evaluate context.getSubject() in SMSOTP we are getting null.