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

Code style fix and documentation typo
remove deprecated constraints calls (Min, Max, MaxLength, MinLength)
[Form] Fixed memory leak in FormValidator
[Intl] make currency bundle merge fallback locales when accessing data, allowing use of country-specific locales
Fix finder date constraints and tests
bug #9445 [BrowserKit] fixed protocol-relative url redirection
[Process] fix phpdoc and timeout of 0
[Locale] fixed the failing test described in #9455
[Form] Added method Form::getClickedButton() to remove memory leak in FormValidator
[HttpFoundation] fixed the issue described in #9480
re-factor Propel1 ModelChoiceList

* add BaseModelChoiceListTest ensuring compatibility
* fix keys and order are preserved
* fix lazy-load to use filters of initial query
unify constructor initialization style throughout symfony
[HttpKernel] better written kernel tests
minor #9479 [Locale] fixed the failing test described in #9455 (andremaha)

This PR was merged into the 2.2 branch.

Discussion
----------

[Locale] fixed the failing test described in #9455

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #9455
| License       | MIT
| Doc PR        | -

Commits
-------

3f91039 [Locale] fixed the failing test described in #9455
updated CHANGELOG for 2.3.7
updated VERSION for 2.3.7
bumped Symfony version to 2.3.8
[Intl] fixed datetime test as described in #9455
bug #9469 [2.2][Propel1] re-factor Propel1 ModelChoiceList (havvg)

This PR was merged into the 2.2 branch.

Discussion
----------

[2.2][Propel1] re-factor Propel1 ModelChoiceList

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | fixes propelorm/Propel#789
| License       | MIT

replaces #9458

Commits
-------

613b5f6 re-factor Propel1 ModelChoiceList
minor #9506 [Intl] fixed datetime test as described in #9455 (andremaha)

This PR was merged into the 2.3 branch.

Discussion
----------

[Intl] fixed datetime test as described in #9455

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #9455
| License       | MIT
| Doc PR        | -

Commits
-------

056d836 [Intl] fixed datetime test as described in #9455