Added phpunit, coveralls, phpcpd and phpmd to composer.json

Author: fpapadopou

Symfony/composer.json

@@ -20,6 +20,12 @@
         "sensio/generator-bundle": "2.3.*",
         "incenteev/composer-parameter-handler": "~2.0"
     },
+    "require-dev": {
+        "phpunit/phpunit": "3.7.*",
+        "satooshi/php-coveralls": "dev-master",
+        "sebastian/phpcpd": "*",
+        "phpmd/phpmd" : "2.0.*"
+    },
     "scripts": {
         "post-install-cmd": [
             "Incenteev\\ParameterHandler\\ScriptHandler::buildParameters",