Support for Federaton 2.5 and 2.6

[RoKKim]

Is there a timeline for the release of tests for @authenticated, @requiresScopes, and @policy directives from Federation versions 2.5 and 2.6?

[dariuszkuc]

TLDR those are enterprise only features and sadly we currently don't have an easy way to test those out (without requiring users to sign up for enterprise trial).

Closing as duplicate of #469