[DepdencyInjection] forgot to add definition of dumped container member variable parameters

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #5408
| License       | MIT
| Doc PR        | n/a

this fixes the allowing of access to parameters property of the dumped container