[FrameworkBundle][Router Cmd] use debug namespace.
minor #12794 [FrameworkBundle][Router Cmd] Use debug namespace. (aitboudad)

This PR was merged into the 2.6 branch.

Discussion
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[FrameworkBundle][Router Cmd] Use debug namespace.

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

Commits
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408df7c [FrameworkBundle][Router Cmd] use debug namespace.