Auth._loadRoles will query the same role multiple times.

[blacha]

Given a role hierarchy of
role:a -> role:b -> role:c
role:a -> role:c

When loading all the roles using Auth._loadRoles for role:a, role:c will be queried for twice.

This seems to be a change in ParseServer, as the role look up Parse.com is much faster when a large number of roles are used.

In my app with a user with 100 roles, ParseServer it will generate over 1000 database queries for _Role lookups for every request.