[SecurityBundle] Fix test context

Author: nicolas-grekas

src/Symfony/Bundle/SecurityBundle/Tests/Functional/UserPasswordEncoderCommandTest.php

@@ -140,6 +140,7 @@ public function testEncodePasswordNoConfigForGivenUserClass()
 
     protected function setUp()
     {
+        putenv('COLUMNS=120');
         $kernel = $this->createKernel(array('test_case' => 'PasswordEncode'));
         $kernel->boot();