title: No commands defined in the doctrine "mapping" namespace (doctrine-module mapping:import)
body: <p>I´m trying to import a database to start a ZF3 PHP project using Doctrine.</p>
  
  <p>I´ve read <a href="http://symfony.com/doc/current/doctrine/reverse_engineering.html" rel="nofollow noreferrer">this tutorial on how to create entities from the database</a> and issued the following command:</p>
  
  <pre><code>$ cd myproject
  $ ./vendor/bin/doctrine-module mapping:import
  </code></pre>
  
  <p>And got this error:</p>
  
  <pre><code>[Symfony\Component\Console\Exception\CommandNotFoundException]
  There are no commands defined in the "mapping" namespace.
  
  The command:
  
  $ ./vendor/bin/doctrine-module list
  </code></pre>
  
  <p>lists the available commands. Only <code>orm:</code>, <code>migration:</code> and <code>dbal:</code> are listed, no <code>mapping:</code> commands at all. </p>
  
  <p>Am I missing some installation phase here ?</p>