* 2.7:
fixed @return when returning this or static
override property constraints in child class
[Console] improved code coverage of Command class
Only count on arrays or countables to avoid warnings in PHP 7.2
* 2.7:
removed @since
Remove and change unrelevant comments in Validator and Security components.
[Validator] UuidValidator must accept a Uuid constraint.
[Validator] make UuidValidator class formatting consistent.
* 2.5:
CS fixes
[2.3] More cs fixes
Removed unused imports
CS fixes
bumped Symfony version to 2.5.9
updated VERSION for 2.5.8
update CONTRIBUTORS for 2.5.8
updated CHANGELOG for 2.5.8
bumped Symfony version to 2.3.24
updated VERSION for 2.3.23
update CONTRIBUTORS for 2.3.23
updated CHANGELOG for 2.3.23
Conflicts:
src/Symfony/Component/Console/Helper/ProgressBar.php
src/Symfony/Component/Debug/ErrorHandler.php
src/Symfony/Component/HttpKernel/Kernel.php
src/Symfony/Component/Security/Http/HttpUtils.php
src/Symfony/Component/Validator/Mapping/Factory/LazyLoadingMetadataFactory.php
