[Security] Run tests on all PHP versions

Symfony 2.7 supports PHP >= 5.3.9

Author: jakzal

src/Symfony/Component/Security/Core/Tests/Encoder/BCryptPasswordEncoderTest.php

@@ -45,19 +45,13 @@ public function testCostInRange()
         }
     }
 
-    /**
-     * @requires PHP 5.3.7
-     */
     public function testResultLength()
     {
         $encoder = new BCryptPasswordEncoder(self::VALID_COST);
         $result = $encoder->encodePassword(self::PASSWORD, null);
         $this->assertEquals(60, strlen($result));
     }
 
-    /**
-     * @requires PHP 5.3.7
-     */
     public function testValidation()
     {
         $encoder = new BCryptPasswordEncoder(self::VALID_COST);
@@ -76,9 +70,6 @@ public function testEncodePasswordLength()
         $encoder->encodePassword(str_repeat('a', 73), 'salt');
     }
 
-    /**
-     * @requires PHP 5.3.7
-     */
     public function testCheckPasswordLength()
     {
         $encoder = new BCryptPasswordEncoder(self::VALID_COST);