Merge branch '2.8' into 3.0

* 2.8:
  Fix merge
  [SecurityBundle] Removing test insulations for a huge perf win
  [Validator] Use the new interface in the README
  [Validator] Add missing pt_BR translation
  Fix doctrine bridge tests on older PHP versions
  [Filesystem] fix tests on 2.3
  [Filesystem] Recursivly widen non-executable directories
  [DependencyInjection] fixed definition loosing property shared when decorated by a parent definition
  [Form] fix #15544 when a collection type attribute "required" is false, "prototype" should too
  updated validators.bg.xlf
  [Security] Enable bcrypt validation and result length tests on all PHP versions
  [Security] Verify if a password encoded with bcrypt is no longer than 72 characters
  [Console] Avoid extra blank lines when rendering exceptions
  [Console][Table] fixed render row with multiple cells.
  [Yaml] do not remove "comments" in scalar blocks

Conflicts:
	src/Symfony/Component/Console/Tests/Fixtures/application_renderexception2.txt
	src/Symfony/Component/DependencyInjection/Compiler/ResolveDefinitionTemplatesPass.php
	src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveDefinitionTemplatesPassTest.php

Author: nicolas-grekas

Tests/Form/Type/EntityTypeTest.php

@@ -603,7 +603,7 @@ public function testSubmitSingleNonExpandedStringCastableIdentifier()
 
         $this->persist(array($entity1, $entity2));
 
-        $field = $this->factory->createNamed('name', EntityType::class, null, array(
+        $field = $this->factory->createNamed('name', 'Symfony\Bridge\Doctrine\Form\Type\EntityType', null, array(
             'multiple' => false,
             'expanded' => false,
             'em' => 'default',
@@ -625,7 +625,7 @@ public function testSubmitSingleStringCastableIdentifierExpanded()
 
         $this->persist(array($entity1, $entity2));
 
-        $field = $this->factory->createNamed('name', EntityType::class, null, array(
+        $field = $this->factory->createNamed('name', 'Symfony\Bridge\Doctrine\Form\Type\EntityType', null, array(
             'multiple' => false,
             'expanded' => true,
             'em' => 'default',
@@ -651,7 +651,7 @@ public function testSubmitMultipleNonExpandedStringCastableIdentifierForExisting
 
         $this->persist(array($entity1, $entity2, $entity3));
 
-        $field = $this->factory->createNamed('name', EntityType::class, null, array(
+        $field = $this->factory->createNamed('name', 'Symfony\Bridge\Doctrine\Form\Type\EntityType', null, array(
             'multiple' => true,
             'expanded' => false,
             'em' => 'default',
@@ -682,7 +682,7 @@ public function testSubmitMultipleNonExpandedStringCastableIdentifier()
 
         $this->persist(array($entity1, $entity2, $entity3));
 
-        $field = $this->factory->createNamed('name', EntityType::class, null, array(
+        $field = $this->factory->createNamed('name', 'Symfony\Bridge\Doctrine\Form\Type\EntityType', null, array(
             'multiple' => true,
             'expanded' => false,
             'em' => 'default',
@@ -707,7 +707,7 @@ public function testSubmitMultipleStringCastableIdentifierExpanded()
 
         $this->persist(array($entity1, $entity2, $entity3));
 
-        $field = $this->factory->createNamed('name', EntityType::class, null, array(
+        $field = $this->factory->createNamed('name', 'Symfony\Bridge\Doctrine\Form\Type\EntityType', null, array(
             'multiple' => true,
             'expanded' => true,
             'em' => 'default',