add phpunit bridge

Author: dbu

composer.json

@@ -26,11 +26,11 @@
         "symfony/framework-bundle": "~2.3"
     },
     "require-dev": {
-        "friendsofsymfony/http-cache": "~1.2@dev",
         "mockery/mockery": "0.9.*",
         "monolog/monolog": "*",
         "sensio/framework-extra-bundle": "~2.3",
         "symfony/symfony": "~2.3",
+        "symfony/phpunit-bridge": "~2.7",
         "symfony/expression-language": "~2.4",
         "symfony/monolog-bundle": "~2.3",
         "polishsymfonycommunity/symfony-mocker-container": "~1.0",