[HttpKernel] fixed route parameters storage in the Request data collector (closes #8867)
merged branch fabpot/router-webprofiler (PR #8894)

This PR was merged into the 2.2 branch.

Discussion
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[HttpKernel] fixed route parameters storage in the Request data collector (closes #8867)

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #8867
| License       | MIT
| Doc PR        | n/a

Commits
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c931eb7 [HttpKernel] fixed route parameters storage in the Request data collector (closes #8867)