SAMLUtils: Create new NameID using passed nameId taking just id and session idx

Signed-off-by: Rohit Yadav <rohit.yadav@shapeblue.com>
SAML2LogoutAPIAuthenticatorCmd: check logout response and redirect to UI

Signed-off-by: Rohit Yadav <rohit.yadav@shapeblue.com>