[SecurityBundle] fixed tests when used in standalone
Merge branch '2.3' into 2.4

* 2.3:
  [SecurityBundle] fixed tests when used in standalone
fixed some composer.json to make standalone component tests pass
fixed standalone component tests depending on Validator and Form
[Validator] fixed component standalone tests
fixed standalone tests
fixed standalone tests
[Debug] fixed class lookup when using PSR-0 with a target dir
minor #12071 [Debug] fixed class lookup when using PSR-0 with a target dir (fabpot)

This PR was merged into the 2.4 branch.

Discussion
----------

[Debug] fixed class lookup when using PSR-0 with a target dir

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

Commits
-------

f5b38ec [Debug] fixed class lookup when using PSR-0 with a target dir
Merge branch '2.4' into 2.5

* 2.4:
  [Debug] fixed class lookup when using PSR-0 with a target dir
  fixed standalone tests
  fixed standalone tests
  [Validator] fixed component standalone tests
  fixed standalone component tests depending on Validator and Form
  fixed some composer.json to make standalone component tests pass
  [SecurityBundle] fixed tests when used in standalone

Conflicts:
	src/Symfony/Component/HttpKernel/Tests/Bundle/BundleTest.php
	src/Symfony/Component/Validator/composer.json
fixed deps
Merge branch '2.5'

* 2.5:
  fixed deps
  [Debug] fixed class lookup when using PSR-0 with a target dir
  fixed standalone tests
  fixed standalone tests
  [Validator] fixed component standalone tests
  fixed standalone component tests depending on Validator and Form
  fixed some composer.json to make standalone component tests pass
  [SecurityBundle] fixed tests when used in standalone
fixed deps
[DependencyInjection] Removed unreachable code
[DX] Moved constants to a final class
minor #12074 [DX] Moved Security constants to a final class instead of a long named interface (iltar)

This PR was merged into the 2.6-dev branch.

Discussion
----------

[DX] Moved Security constants to a final class instead of a long named interface

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | -
| License       | MIT
| Doc PR        | symfony/symfony-docs#4188

This PR is based on feedback from the documentation repository. The DX suggestion was to rename the new `SecuritySessionStorageInterface` to `Security`. This would make it easier to use the constants before 2.6 is released. In this PR I have also update all usages of this constant because an open PR is now merged which used those constants.

List of changes:
 - SecurityBundle, usage of constants
 - Security Component (core & http), usage of constants
 - Tests, usage of constants
 - Added a test to verify the sync from `Security` to `SecurityContextInterface` for BC purposes

Commits
-------

b23084a [DX] Moved constants to a final class
minor #12072 [DependencyInjection] Removed unreachable code (unkind)

This PR was merged into the 2.6-dev branch.

Discussion
----------

[DependencyInjection] Removed unreachable code

| Q             | A
| ------------- | ---
| Bug fix?      | not really
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | n/a
| License       | MIT
| Doc PR        | n/a

According to undefined $e, this is an unreachable code. As I can see, circular references are handled by parent method.

Commits
-------

ecedea2 [DependencyInjection] Removed unreachable code