[FrameworkBundle] minor fix

A small fix in the "parse" function of the "ControllerNameParser" Controller.
We should use "!==" instead of "!=" since it's better and faster in this case.

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | NA
| License       | MIT
| Doc PR        | NA
Merge branch '2.3' into 2.5

* 2.3:
  [FrameworkBundle] minor fix
  [Console] add a dot
  [Form] remove unnecessary call

Conflicts:
	src/Symfony/Component/Console/Tests/Fixtures/application_1.json
	src/Symfony/Component/Console/Tests/Fixtures/application_2.json