Merge branch '2.3' into 2.6

* 2.3:
  [Validator] Add missing pt_BR translations
  Add parsing of hexadecimal strings for PHP 7
  [Configuration] improve description for ignoreExtraKeys on ArrayNodeDefinition
  [Validator] Added missing Hungarian translation
  [Validator] Fixed grammar in Hungarian translation
  CS: Unary operators should be placed adjacent to their operands
  CS: Binary operators should be arounded by at least one space
  remove useless tests that fail in php 7
  [Translator] fix test for php 7 compatibility
  Update phpdoc of ProcessBuilder#setPrefix()

Conflicts:
	src/Symfony/Component/HttpFoundation/Session/Attribute/NamespacedAttributeBag.php
	src/Symfony/Component/PropertyAccess/PropertyAccessor.php
	src/Symfony/Component/Validator/Resources/translations/validators.pt_BR.xlf
	src/Symfony/Component/Yaml/Parser.php

Author: fabpot

Form/Type/DoctrineType.php

@@ -60,7 +60,7 @@ public function buildForm(FormBuilderInterface $builder, array $options)
 
     public function setDefaultOptions(OptionsResolverInterface $resolver)
     {
-        $choiceListCache = & $this->choiceListCache;
+        $choiceListCache = &$this->choiceListCache;
         $registry = $this->registry;
         $propertyAccessor = $this->propertyAccessor;
         $type = $this;

Tests/Logger/DbalLoggerTest.php

@@ -87,7 +87,7 @@ public function testLogLongString()
         $testString = 'abc';
 
         $shortString = str_pad('', DbalLogger::MAX_STRING_LENGTH, $testString);
-        $longString = str_pad('', DbalLogger::MAX_STRING_LENGTH+1, $testString);
+        $longString = str_pad('', DbalLogger::MAX_STRING_LENGTH + 1, $testString);
 
         $dbalLogger
             ->expects($this->once())