title: Symfony2 : doctrine orm ignore if I change table name
body: <p>I made a new Entity called Comment using the command : <strong>php app/console doctrine:generate:entity</strong></p>
  
  <p>I changed its name in the Comment.php file like this :</p>
  
  <pre><code>/**
   * Comment
   *
   * @ORM\Table(name="blog_comment")
   * @ORM\Entity(repositoryClass="Mysite\BlogBundle\Entity\CommentRepository")
   */
  class Comment
  {
  
  /**
  * @ORM\ManyToOne(targetEntity="Mysite\BlogBundle\Entity\Article")
  * @ORM\JoinColumn(nullable=false)
  */
  private $article;
  </code></pre>
  
  <p>When I try the command <strong>php app/console doctrine:schema:update --dump-sql</strong>, it returns me "CREATE TABLE Comment ...". So it ignores my changes ?</p>
  
  <p>I just cleared cache and tried again, nothing changes... Any idea ?</p>