[Security][Acl] Issue #5787 : Added MutableAclProvider::deleteSecurityIdentity

Code style fix and documentation typo
Fix finder date constraints and tests
Consider KERNEL_DIR setting as relative to the PhpUnit XML file if it does not point to a directory (relative to the current cwd)
Changes the form icon in the toolbar to be pixel perfect.
[Security] Add ExpressionLanguage to require-dev.
minor #9778 [Security] Add ExpressionLanguage to require-dev. (realityking)

This PR was merged into the 2.4 branch.

Discussion
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[Security] Add ExpressionLanguage to require-dev.

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

Running the tests for Security-Core fails because ExpressionLanguage is missing.

Commits
-------

7f18d19 [Security] Add ExpressionLanguage to require-dev.
[FrameworkBundle] Fixed bug in XMLDescriptor
bug #9768 [FrameworkBundle] Fixed bug in XMLDescriptor (Exelenz)

This PR was squashed before being merged into the 2.4 branch (closes #9768).

Discussion
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[FrameworkBundle] Fixed bug in XMLDescriptor

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

Fixed bug in container:debug command where parameter value doesn't get printed.

Commits
-------

34d0b1d [FrameworkBundle] Fixed bug in XMLDescriptor
Bumping dependency to ProxyManager to allow testing against the new 0.5.x branch changes
minor #9358 Bumping dependency to ProxyManager to allow testing against the new 0.5.x versions (Ocramius)

This PR was submitted for the 2.4-dev branch but it was merged into the 2.4 branch instead (closes #9358).

Discussion
----------

Bumping dependency to ProxyManager to allow testing against the new 0.5.x versions

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | no (looks like an unrelated failure, though)
| Fixed tickets |
| License       | MIT
| Doc PR        |

Nothing to see here. Move along.

Commits
-------

5377992 Bumping dependency to ProxyManager to allow testing against the new 0.5.x branch changes
fix deprecated usage and clarify constructor defaults for number formatter

by using the real default one can see the actual value without having to look into the implementation what NULL stands for
minor #9488 [Form] fix deprecated usage and clarify constructor defaults for number formatter (Tobion)

This PR was submitted for the 2.4-dev branch but it was merged into the 2.4 branch instead (closes #9488).

Discussion
----------

[Form] fix deprecated usage and clarify constructor defaults for number formatter

By using the real default one can see the actual value without having to look into the implementation what NULL stands for

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

Commits
-------

5a25989 [Form] fix deprecated usage and clarify constructor defaults for number formatter
Crawler default namespace fix
bug #9771 Crawler default namespace fix (crudecki)

This PR was squashed before being merged into the 2.4 branch (closes #9771).

Discussion
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Crawler default namespace fix

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | yes
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #9732, #6650
| License       | MIT
| Doc PR        | symfony/symfony-docs/pull/2979

Fix backwards compatibility of xml namespaces for having only one default namespace.

Commits
-------

cfff054 Crawler default namespace fix
fixed CS
[FrameworkBundle] Added extra details in XMLDescriptor to improve container description
feature #9775 [FrameworkBundle] Added extra details in XMLDescriptor to improve container description (Exelenz)

This PR was squashed before being merged into the 2.4 branch (closes #9775).

Discussion
----------

[FrameworkBundle] Added extra details in XMLDescriptor to improve container description

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

Added some new attributes to XMLDescriptor used by container:debug command.
~~This PR is based on #9768 PR.~~

Commits
-------

8edc855 [FrameworkBundle] Added extra details in XMLDescriptor to improve container description
minor #9689 [Form] Improved debugger icon (sukei)

This PR was merged into the 2.4 branch.

Discussion
----------

[Form] Improved debugger icon

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

Changes the form icon in the toolbar to be pixel perfect.

| before                                                                                               | after                                                                                               |
| ---------------------------------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------- |
| ![before](https://f.cloud.github.com/assets/890645/1558707/8c4e2d42-4fa4-11e3-9397-376f761869a2.png) | ![after](https://f.cloud.github.com/assets/890645/1558708/90257844-4fa4-11e3-8a83-73d163d47261.png) |

Commits
-------

74e59fe Changes the form icon in the toolbar to be pixel perfect.
Allow cache drivers that are not an EM's child
added condition to avoid skipping tests on JSON_PRETTY support