added greek translation
[Security] fixed issue where authentication listeners clear unrelated tokens

This commit fixes an issue where authentication listeners clear all security tokens in case of authentication failure.
This behavior makes it impossible to combine certain authentication mechanisms, notably x509 with form-based login.
Merge branch '2.2' into 2.3

* 2.2:
  [PropertyAccess] added moves to pluralMap
  [Security] fixed issue where authentication listeners clear unrelated tokens
  fix issue #8499 modelChoiceList call getPrimaryKey on a non object
  [DependencyInjection] Add exception for service name not dumpable in PHP

Conflicts:
	src/Symfony/Component/DependencyInjection/Dumper/PhpDumper.php
	src/Symfony/Component/DependencyInjection/Tests/Dumper/PhpDumperTest.php
	src/Symfony/Component/Security/Tests/Http/Firewall/BasicAuthenticationListenerTest.php
Merge branch '2.3'

* 2.3:
  [PropertyAccess] added moves to pluralMap
  [Security] fixed issue where authentication listeners clear unrelated tokens
  added greek translation
  [DependencyInjection] Add exception for service name not dumpable in PHP
  bumped Symfony version to 2.3.3-DEV
  fix issue #8499 modelChoiceList call getPrimaryKey on a non object
  updated VERSION for 2.3.2
  updated CHANGELOG for 2.3.2
  [DependencyInjection] Add exception for service name not dumpable in PHP
  fixed typo
  bumped Symfony version to 2.2.5
  updated VERSION for 2.2.4
  update CONTRIBUTORS for 2.2.4
  updated CHANGELOG for 2.2.4
  Fixed NativeSessionStorage:regenerate when does not exists
  removed extraneous whitespaces

Conflicts:
	src/Symfony/Component/HttpKernel/Kernel.php