Changed some method name to make it PSR-1 compliant

This fixes symfony#7

Author: javiereguiluz

app/Resources/views/blog/post_show.html.twig

@@ -9,7 +9,7 @@
 
     <div id="post-add-comment" class="well">
         {% if is_granted('IS_AUTHENTICATED_FULLY') %}
-            {{ render(controller('AppBundle:Blog:_commentForm', { 'id': post.id })) }}
+            {{ render(controller('AppBundle:Blog:commentForm', { 'id': post.id })) }}
         {% else %}
             <p>
                 <a class="btn btn-success" href="{{ path('security_login_form') }}">

src/AppBundle/Controller/BlogController.php

@@ -97,7 +97,7 @@ public function commentNewAction(Request $request, Post $post)
      *
      * @return Response
      */
-    public function _commentFormAction(Post $post)
+    public function commentFormAction(Post $post)
     {
         $form = $this->createCommentForm($post);