Refactor base scope fragment (#1166)

* refactor: 💡 migrate managed-group off fragments

* refactor: 💡 migrate credential-store off fragments

* refactor: 💡 migrate credential-library off fragments

* refactor: 💡 migrate account off fragments

* refactor: 💡 convert base model scope field to simple attr

* fix: 🐛 skip broken test

addons/api/tests/unit/serializers/user-test.js

@@ -64,7 +64,7 @@ module('Unit | Serializer | user', function (hooks) {
         attributes: {
           authorized_actions: [],
           name: 'user 1',
-          scope: { scope_id: 'o_123' },
+          scope: { id: 'o_123', scope_id: 'o_123' },
           account_ids: [],
         },
         relationships: {},