Update JsonResponse.php

Added JSON_NUMERIC_CHECK flag to fix issues when json response is used in JavaScript apps and especially in AngularJS.
Merge branch '2.2' into 2.3

* 2.2:
  Update JsonResponse.php
  [HttpKernel] fixed the inline renderer when passing objects as attributes (closes #7124)
  [WebProfiler] fix content-type parameter
  Replace romaji period characters with Japanese style zenkaku period characters
  Passed the config when building the Configuration in ConfigurableExtension

Conflicts:
	src/Symfony/Bundle/FrameworkBundle/Tests/Functional/Bundle/TestBundle/Resources/config/routing.yml
	src/Symfony/Component/HttpKernel/Tests/Fragment/InlineFragmentRendererTest.php