MFA result reuse with Duo.

[O'Dowd, Josh]

Thanks Scott,

That is very helpful because I am not currently doing this right.

> You drive this by supplying requirements via the SAML request or when need be by specifying this in the defaultAuthenticationMethods property of a relying party override (which I would advise triggering with metadata via an EntityAttribute).

I understand the process for setting up an RP override.  In this case, I am not sure about using the EntityAttribute because, at least so far, the RPs I am being asked to require Duo for are going to be CAS authenticating and restricted to faculty/staff attempts(never any lack of excitement in what they ask for around here!).

-Josh