Configure the sso_on_2fa option for inst-a and b

Author: MKodde

stepup/middleware/middleware-institution.json

@@ -15,6 +15,7 @@
     "allowed_second_factors": [],
     "number_of_tokens_per_identity": 2,
     "self_vet": true,
+    "sso_on_2fa": true,
     "allow_self_asserted_tokens": true
   },
   "institution-b.example.com": {
@@ -24,6 +25,7 @@
     "allowed_second_factors": [],
     "number_of_tokens_per_identity": 2,
     "self_vet": false,
+    "sso_on_2fa": true,
     "allow_self_asserted_tokens": true
   },
   "institution-d.example.com": {