Yang Wang 84a2f1adf2
Resolve anonymous roles and deduplicate roles during authentication (#53453) (#55995)
Anonymous roles resolution and user role deduplication are now performed during authentication instead of authorization. The change ensures:

* If anonymous access is enabled, user will be able to see the anonymous roles added in the roles field in the /_security/_authenticate response.
* Any duplication in user roles are removed and will not show in the above authenticate response.
* In any other case, the response is unchanged.

It also introduces a behaviour change: the anonymous role resolution is now authentication node specific, previously it was authorization node specific. Details can be found at #47195 (comment)
2020-04-30 17:34:14 +10:00
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