[Security] PHPDoc in SecurityEvents
merged branch franmomu/added_phpdoc_security_events (PR #6818)

This PR was squashed before being merged into the 2.0 branch (closes #6818).

Commits
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598ae9d [Security] PHPDoc in SecurityEvents

Discussion
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[Security] PHPDoc in SecurityEvents

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets |
| License       | MIT
| Doc PR        |

I'm not sure about the description given.