Best practice MFA IdP3.3.1

[Cantor, Scott]

> I use conversationScope as variable storage and it seems to work pretty well.
> As long as I can get the SpringRequestContext I can access the conversation
> scope.  I haven't tried it in the attribute resolver, but it seems like the
> SpringRequestContext would be available somewhere.

Somewhere being the operative word, but the context tree is entirely divorced from Spring and WebFlow and just keeps things nicely separate.

-- Scott