[Book][Security] constants are defined in the SecurityContextInterface
bug #3779 [Book][Security] constants are defined in the SecurityContextInterface (xabbuh)

This PR was merged into the 2.3 branch.

Discussion
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[Book][Security] constants are defined in the SecurityContextInterface

| Q             | A
| ------------- | ---
| Doc fix?      | yes
| New docs?     | no
| Applies to    | all
| Fixed tickets |

Commits
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4b7c8c2 [Book][Security] constants are defined in the SecurityContextInterface