Merge branch '2.6' into 2.7

* 2.6:
  [Translator] Cache does not take fallback locales into consideration
  [VarDumper] Fix call site detection
  [Process] Fix volatile test
  Remove some useless @group annotations
  Removed useless strtolower call
  [Validator] Use strict comparisons in loaders
  CS: Use "self" keyword instead of class name if possible

Conflicts:
	.travis.yml
	src/Symfony/Component/Translation/Translator.php

Author: fabpot

Tests/Validator/Constraints/UniqueEntityValidatorTest.php

@@ -336,9 +336,6 @@ public function testValidateUniquenessWithUnrewoundArray()
         $this->assertNoViolation();
     }
 
-    /**
-     * @group GH-1635
-     */
     public function testAssociatedEntity()
     {
         $constraint = new UniqueEntity(array(
@@ -395,7 +392,6 @@ public function testAssociatedEntityWithNull()
     /**
      * @expectedException \Symfony\Component\Validator\Exception\ConstraintDefinitionException
      * @expectedExceptionMessage Associated entities are not allowed to have more than one identifier field
-     * @group GH-1635
      */
     public function testAssociatedCompositeEntity()
     {