minor #401 Modify default routing parameter on indexAction (hanahiroAze)

This PR was merged into the master branch.

Discussion
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Modify default routing parameter on indexAction

I found $page parameter's type on default routing is different from that of "/page/{page}" routing.
This difference seems not to be reasonable, then I fix it.

Commits
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1cc1f9c modify default param page's type for / on BlogController to be same as that of "/page/{page}"

src/AppBundle/Controller/BlogController.php

@@ -34,7 +34,7 @@
 class BlogController extends Controller
 {
     /**
-     * @Route("/", defaults={"page": 1}, name="blog_index")
+     * @Route("/", defaults={"page": "1"}, name="blog_index")
      * @Route("/page/{page}", requirements={"page": "[1-9]\d*"}, name="blog_index_paginated")
      * @Method("GET")
      * @Cache(smaxage="10")