title: ParameterNotFoundException: You have requested a non-existent parameter "database_accounts_driver"
body: <p>when I make update for a symfony2 project using compser.phar : </p>
  
  <pre><code>php composer.phar update
  </code></pre>
  
  <p>I have this error when I run the project after updating :</p>
  
  <pre><code>ParameterNotFoundException: You have requested a non-existent parameter "database_accounts_driver".
  </code></pre>
  
  <p>here is my config.yml : </p>
  
  <pre><code># Doctrine Configuration
  doctrine:
  dbal:
      default_connection:       default
      connections:
          default:
              driver:   "%database_driver%"
              host:     "%database_host%"
              port:     "%database_port%"
              dbname:   "%database_name%"
              user:     "%database_user%"
              password: "%database_password%"
              charset:  UTF8
          accounts:
              driver:   "%database_accounts_driver%"
              host:     "%database_accounts_host%"
              port:     "%database_accounts_port%"
              dbname:   "%database_accounts_name%"
              user:     "%database_accounts_user%"
              password: "%database_accounts_password%"
              charset:  UTF8
  </code></pre>
  
  <p>also my parameter.yml : </p>
  
  <pre><code>parameters:
  database_driver:   pdo_mysql
  database_host:     127.0.0.1
  database_port:     ~
  database_name:     symfony
  database_user:     root
  database_password: ~
  
  mailer_transport:  smtp
  mailer_host:       127.0.0.1
  mailer_user:       ~
  mailer_password:   ~
  
  locale:            en
  secret:            ThisTokenIsNotSoSecretChangeIt
  </code></pre>
  
  <p>and finally my appkernel : </p>
  
  <pre><code>$bundles = array(
          new Symfony\Bundle\FrameworkBundle\FrameworkBundle(),
          new Symfony\Bundle\SecurityBundle\SecurityBundle(),
          new Symfony\Bundle\TwigBundle\TwigBundle(),
          new Symfony\Bundle\MonologBundle\MonologBundle(),
          new Symfony\Bundle\SwiftmailerBundle\SwiftmailerBundle(),
          new Symfony\Bundle\AsseticBundle\AsseticBundle(),
          new Sensio\Bundle\FrameworkExtraBundle\SensioFrameworkExtraBundle(),
          new JMS\AopBundle\JMSAopBundle(),
          new JMS\DiExtraBundle\JMSDiExtraBundle($this),
          new JMS\SecurityExtraBundle\JMSSecurityExtraBundle(),
  </code></pre>
  
  <p>Any Idea?</p>