added Debug component as testing dependency
merged branch xabbuh/issue7702 (PR #7728)

This PR was merged into the master branch.

Discussion
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[HttpKernel] added Debug component as testing dependency

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #7702
| License       | MIT
| Doc PR        |

Commits
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6ab17e2 added Debug component as testing dependency