fix #10054 - form data collector with dynamic fields

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #10054
| License       | MIT
| Doc PR        | -
No global state for isolated tests and other fixes
Merge branch '2.3' into 2.5

* 2.3:
  No global state for isolated tests and other fixes
  [TwigBundle] Moved the setting of the default escaping strategy from the Twig engine to the Twig environment
  [Debug] fix checkip6
  [HttpFoundation] fixed error when an IP in the X-Forwarded-For HTTP header contains a port
  Update the note about origins of the CssSelector component.
  Use the correct cssselect library name in docblocks.
fix regression in form tests after pr #13027 | Q             | A | ------------- | --- | Bug fix?      | yes | New feature?  | no | BC breaks?    | no | Deprecations? | no | Tests pass?   | yes | Fixed tickets | - | License       | MIT | Doc PR        | -
Remove usages of deprecated constants
Replace usages of the deprecated TypeTestCase by the new one
Fix phpdoc and coding standards

This removes the unused use statements which were not catched by
PHP-CS-Fixer because of string occurences. It also fixes some invalid
phpdoc (scalar is not recognized as a valid type for instance).
minor #13161 Remove usages of deprecated constants (stof)

This PR was merged into the 2.3 branch.

Discussion
----------

Remove usages of deprecated constants

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

This removes the usage of deprecated constants in our code.

I'm applying this in 2.3 to make merging branches easier. This is especially needed for 2.7 because of deprecation warnings added in #13060 (warnings are triggered in this PR because of these usages)

Commits
-------

6c00c22 Remove usages of deprecated constants
minor #13162 Fix phpdoc and coding standards (stof)

This PR was merged into the 2.3 branch.

Discussion
----------

Fix phpdoc and coding standards

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

This removes the unused use statements which were not catched by PHP-CS-Fixer because of string occurences. It also fixes some invalid phpdoc (scalar is not recognized as a valid type for instance).

This is complementary to https://github.com/symfony/symfony/pull/13134

Commits
-------

8cc3f6a Fix phpdoc and coding standards
Merge branch '2.3' into 2.5

* 2.3:
  Updated generateSql tool
  Fix the implementation of deprecated Locale classes
  Fix phpdoc and coding standards
  Replace usages of the deprecated TypeTestCase by the new one
  Remove usages of deprecated constants
  Update functional tests to use the PSR NullLogger
  Make fabbot happy
  Clean up testing
  [DomCrawler] fixed bug #12143

Conflicts:
	src/Symfony/Bridge/Doctrine/Tests/Validator/Constraints/UniqueEntityValidatorTest.php
	src/Symfony/Bundle/FrameworkBundle/Tests/Templating/TimedPhpEngineTest.php
	src/Symfony/Bundle/TwigBundle/Tests/Loader/FilesystemLoaderTest.php
	src/Symfony/Component/Console/Application.php
	src/Symfony/Component/DomCrawler/Crawler.php
	src/Symfony/Component/Form/Tests/Extension/Core/Type/CollectionTypeTest.php
	src/Symfony/Component/Form/Tests/Extension/Csrf/Type/FormTypeCsrfExtensionTest.php
	src/Symfony/Component/HttpKernel/Tests/Bundle/BundleTest.php
	src/Symfony/Component/Serializer/Encoder/EncoderInterface.php
	src/Symfony/Component/Serializer/Encoder/XmlEncoder.php
	src/Symfony/Component/Validator/Tests/Mapping/ClassMetadataFactoryTest.php
Merge branch '2.5' into 2.6

* 2.5:
  Updated generateSql tool
  Fix the implementation of deprecated Locale classes
  Fix phpdoc and coding standards
  Replace usages of the deprecated TypeTestCase by the new one
  Remove usages of deprecated constants
  Update functional tests to use the PSR NullLogger
  fix regression in form tests after pr #13027 | Q             | A | ------------- | --- | Bug fix?      | yes | New feature?  | no | BC breaks?    | no | Deprecations? | no | Tests pass?   | yes | Fixed tickets | - | License       | MIT | Doc PR        | -
  Make fabbot happy
  Clean up testing
  No global state for isolated tests and other fixes
  No global state for isolated tests and other fixes
  fix #10054 - form data collector with dynamic fields
  [TwigBundle] Moved the setting of the default escaping strategy from the Twig engine to the Twig environment
  [Debug] fix checkip6
  [HttpFoundation] fixed error when an IP in the X-Forwarded-For HTTP header contains a port
  Update the note about origins of the CssSelector component.
  Use the correct cssselect library name in docblocks.
  [DomCrawler] fixed bug #12143

Conflicts:
	src/Symfony/Bundle/FrameworkBundle/Templating/GlobalVariables.php
	src/Symfony/Component/Serializer/Normalizer/DenormalizableInterface.php
fixed unit tests
Merge branch '2.5' into 2.6

* 2.5:
  fixed unit tests