Return BC compatibility for `@Route` parameters and default values
merged branch stloyd/bugfix/issue-7724 (PR #8393)

This PR was merged into the 2.2 branch.

Discussion
----------

[2.2] Return BC compatibility for `@Route` parameters and default values

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #7724
| License       | MIT

Commits
-------

d400b5a Return BC compatibility for `@Route` parameters and default values