removed deps checks in unit tests

As Composer is now widely used in the PHP world, having to run composer
install before running the test suite is expected. This also has the
nice benefit of removing a bunch of code, making things easier to
maintain (there is only one place to declare a dev dependency), and
probably more.
[Console] Improved searching commands
Include untrusted host in the exception message
fix for Process:isSuccessful()
merged branch tgabi333/2.2 (PR #8815)

This PR was merged into the 2.2 branch.

Discussion
----------

[Process] fix for Process:isSuccessful()

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

This is a rebase of https://github.com/symfony/symfony/pull/8801

If you call isSuccessful() on a running process you would get true because of 0 == null. I think that is not the expected behavior and that is not what phpdoc @return block said so.

Commits
-------

262879d fix for Process:isSuccessful()
merged branch Seldaek/untrusted (PR #8810)

This PR was merged into the 2.3 branch.

Discussion
----------

Include untrusted host in the exception message

`Invalid *` error message without the actual value that triggered them are really unhelpful to debug issues.

Commits
-------

fd2f633 Include untrusted host in the exception message
added a missing use statement (closes #8808)
Fix typo in the check_path validator
merged branch unkind/security-bundle-check-path-bugfix (PR #8782)

This PR was submitted for the master branch but it was merged into the 2.2 branch instead (closes #8782).

Discussion
----------

[SecurityBundle] Fix typo in the check_path validator

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #3005, #2954
| License       | MIT

Actually, validator of `check_path` value is broken by #3005. It doesn't throw any exception even if `check_path` is an URI.

I've faced with wrong tests class hierarchy: `SecurityExtensionTest` is abstract test and I have to create the same test configuration for every format: PHP, XML, YAML. It looks like we test `Dependency Injection` and `Yaml` components. Issue with `check_path` does not depend on format, but such class hierarchy leaves me no choice. And I can't put test case into `ConfigurationTest`, because it doesn't know anything about security factories.

It looks like it's better to create new class for `SecurityExtension` tests.

Commits
-------

155dca0 [SecurityBundle] Fix typo in the check_path validator
fixed the format of the request used to render an exception
[HttpFoundation] added constants for HTTP status code in Response
Exclude little words of 'ee' to 'oo' plural transformation

The plural form of 'bee' and 'fee' are not 'foo' and 'boo'. In general words smaller than 3 letters doesn't change to a 'oo' form.
merged branch sumbobyboys/patch-1 (PR #8804)

This PR was submitted for the master branch but it was merged into the 2.2 branch instead (closes #8804).

Discussion
----------

Exclude little words of 'ee' to 'oo' plural transformation

The plural form of 'bee' and 'fee' are not 'foo' and 'boo'. In general words smaller than 3 letters doesn't change to a 'oo' form.

Commits
-------

0ffdb11 Exclude little words of 'ee' to 'oo' plural transformation
Sets _format attribute only if it wasn't set previously by the user.

Fixes #8787
fixed request format of sub-requests when explicitely set by the developer (closes #8787)
merged branch hason/console (PR #8800)

This PR was merged into the master branch.

Discussion
----------

[Console] Improved searching commands

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

I was very annoyed when I typed the command ``app/console a:d`` and I saw this exception ``The namespace "a" is ambiguous (assets, assetic)``. However, the shortcut ``a:d`` is unambiguous (``assets:install`` vs ``assetic:dump``).

Commits
-------

0beec8a [Console] Improved searching commands
[Locale] fixed build-data exit code in case of an error

When passing a message to the exit() function, PHP returns 0 instead of
an error code.
merged branch fabpot/exception-format (PR #8819)

This PR was merged into the 2.2 branch.

Discussion
----------

[HttpKernel] Fix request _format duplication for HttpKernel's ExceptionListener

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #8777, #8778
| License       | MIT

This is a better fix for #8777.

Commits
-------

f946108 fixed the format of the request used to render an exception
merged branch fabpot/inline-fragment-format (PR #8821)

This PR was merged into the 2.2 branch.

Discussion
----------

Sets _format attribute only if it wasn't set previously by the user

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #8787, #8791
| License       | MIT
| Doc PR        |

Commits
-------

9bb7a3d fixed request format of sub-requests when explicitely set by the developer (closes #8787)
fa35597 Sets _format attribute only if it wasn't set previously by the user.
Merge branch '2.2' into 2.3

* 2.2:
  [Locale] fixed build-data exit code in case of an error
  fixed request format of sub-requests when explicitely set by the developer (closes #8787)
  Sets _format attribute only if it wasn't set previously by the user.
  Exclude little words of 'ee' to 'oo' plural transformation
  fixed the format of the request used to render an exception
  Fix typo in the check_path validator
  added a missing use statement (closes #8808)
  fix for Process:isSuccessful()

Conflicts:
	UPGRADE-3.0.md
	src/Symfony/Component/Locale/Resources/data/build-data.php