Merge branch '2.3' into 2.5

* 2.3:
  [2.3] More cs fixes
  Removed unused imports
  CS fixes
  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/Bundle/FrameworkBundle/EventListener/SessionListener.php
	src/Symfony/Bundle/SecurityBundle/DependencyInjection/MainConfiguration.php
	src/Symfony/Component/HttpKernel/Kernel.php
	src/Symfony/Component/HttpKernel/Tests/Bundle/BundleTest.php
	src/Symfony/Component/Routing/Matcher/Dumper/PhpMatcherDumper.php

Author: fabpot

Compiler/CheckExceptionOnInvalidReferenceBehaviorPass.php

@@ -12,7 +12,6 @@
 namespace Symfony\Component\DependencyInjection\Compiler;
 
 use Symfony\Component\DependencyInjection\Definition;
-
 use Symfony\Component\DependencyInjection\Exception\ServiceNotFoundException;
 use Symfony\Component\DependencyInjection\ContainerInterface;
 use Symfony\Component\DependencyInjection\Reference;

Tests/Compiler/AnalyzeServiceReferencesPassTest.php

@@ -12,7 +12,6 @@
 namespace Symfony\Component\DependencyInjection\Tests\Compiler;
 
 use Symfony\Component\DependencyInjection\Definition;
-use Symfony\Component\DependencyInjection\Compiler\Compiler;
 use Symfony\Component\DependencyInjection\Compiler\AnalyzeServiceReferencesPass;
 use Symfony\Component\DependencyInjection\Compiler\RepeatedPass;
 use Symfony\Component\DependencyInjection\Reference;

Tests/Compiler/CheckCircularReferencesPassTest.php

@@ -12,13 +12,9 @@
 namespace Symfony\Component\DependencyInjection\Tests\Compiler;
 
 use Symfony\Component\DependencyInjection\Reference;
-
 use Symfony\Component\DependencyInjection\Compiler\CheckCircularReferencesPass;
-
 use Symfony\Component\DependencyInjection\Compiler\AnalyzeServiceReferencesPass;
-
 use Symfony\Component\DependencyInjection\Compiler\Compiler;
-
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 
 class CheckCircularReferencesPassTest extends \PHPUnit_Framework_TestCase

Tests/Compiler/CheckExceptionOnInvalidReferenceBehaviorPassTest.php

@@ -12,7 +12,6 @@
 namespace Symfony\Component\DependencyInjection\Tests\Compiler;
 
 use Symfony\Component\DependencyInjection\Definition;
-
 use Symfony\Component\DependencyInjection\Compiler\CheckExceptionOnInvalidReferenceBehaviorPass;
 use Symfony\Component\DependencyInjection\Reference;
 use Symfony\Component\DependencyInjection\ContainerBuilder;

Tests/Compiler/CheckReferenceValidityPassTest.php

@@ -12,7 +12,6 @@
 namespace Symfony\Component\DependencyInjection\Tests\Compiler;
 
 use Symfony\Component\DependencyInjection\Scope;
-
 use Symfony\Component\DependencyInjection\Compiler\CheckReferenceValidityPass;
 use Symfony\Component\DependencyInjection\ContainerInterface;
 use Symfony\Component\DependencyInjection\Reference;

Tests/Compiler/RemoveUnusedDefinitionsPassTest.php

@@ -12,7 +12,6 @@
 namespace Symfony\Component\DependencyInjection\Tests\Compiler;
 
 use Symfony\Component\DependencyInjection\Compiler\AnalyzeServiceReferencesPass;
-use Symfony\Component\DependencyInjection\Compiler\Compiler;
 use Symfony\Component\DependencyInjection\Compiler\RepeatedPass;
 use Symfony\Component\DependencyInjection\Compiler\RemoveUnusedDefinitionsPass;
 use Symfony\Component\DependencyInjection\Definition;

Tests/Loader/XmlFileLoaderTest.php

@@ -12,7 +12,6 @@
 namespace Symfony\Component\DependencyInjection\Tests\Loader;
 
 use Symfony\Component\DependencyInjection\ContainerInterface;
-
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\Reference;
 use Symfony\Component\DependencyInjection\Definition;