Fix a deprecated method call in the tests

Author: vicb

src/Symfony/Component/Validator/Tests/Constraints/ChoiceValidatorTest.php

@@ -11,7 +11,6 @@
 
 namespace Symfony\Component\Validator\Tests\Constraints;
 
-use Symfony\Component\Validator\ExecutionContext;
 use Symfony\Component\Validator\Constraints\Choice;
 use Symfony\Component\Validator\Constraints\ChoiceValidator;
 
@@ -37,7 +36,7 @@ protected function setUp()
  $this->validator->initialize($this->context);
 
  $this->context->expects($this->any())
- ->method('getCurrentClass')
+ ->method('getClassName')
  ->will($this->returnValue(__CLASS__));
  }