Added given and family name fields to profile scope

This information mirrors the fields returned in our ID token for OpenID
Connect (OIDC). Including this information will allow us to eventually
migrate toward replacing OIDC with OAuth 2.0 + JWT.

ECOM-3628

openedx/core/djangoapps/oauth_dispatch/tests/mixins.py

@@ -67,8 +67,12 @@ class AccessTokenMixin(object):
             except UserProfile.DoesNotExist:
                 name = None
 
-            expected['name'] = name
-            expected['administrator'] = user.is_staff
+            expected.update({
+                'name': name,
+                'administrator': user.is_staff,
+                'family_name': user.last_name,
+                'given_name': user.first_name,
+            })
 
         self.assertDictContainsSubset(expected, payload)
 

openedx/core/lib/token_utils.py

@@ -93,6 +93,8 @@ class JwtBuilder(object):
 
         payload.update({
             'name': name,
+            'family_name': self.user.last_name,
+            'given_name': self.user.first_name,
             'administrator': self.user.is_staff,
         })