idp/SSOService.php: Fix saving of NameID sent to SP.
idp/SSOService.php: Fix saving of NameID sent to SP.

ArtemTeleshev/php-saml2,madmatt/saml2,sgomez/saml2,newmen/saml2,sitya/saml2,cb8/saml2,simplesamlphp/saml2