[Security] Removed security-acl from the core

Author: Iltar van der Berg

composer.json

@@ -18,7 +18,8 @@
     "require": {
         "php": ">=5.3.9",
         "symfony/security": "~2.8|~3.0.0",
-        "symfony/http-kernel": "~2.2|~3.0.0"
+        "symfony/http-kernel": "~2.2|~3.0.0",
+        "symfony/security-acl": "~2.8|~3.0.0"
     },
     "require-dev": {
         "symfony/phpunit-bridge": "~2.7|~3.0.0",