[FrameworkBundle] use the new request_stack service to get the Request object in the base Controller class
bug #9553 [FrameworkBundle] use the new request_stack service to get the Request object in the base Controller class (hhamon)

This PR was merged into the master branch.

Discussion
----------

[FrameworkBundle] use the new request_stack service to get the Request object in the base Controller class

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

Commits
-------

2e07338 [FrameworkBundle] use the new request_stack service to get the Request object in the base Controller class