title: call plugin from plugin in zf2
body: <p>I am using zf2 and I have created a few plugins that I can call from any controller in any plugin (so, no problem with that).
  To do so, in the controller where the plugin is, I have added this to the module.config.php</p>
  
  <pre><code>'controler_plugins' =&gt; array(
      'invokables' =&gt; array(
          'myplugin' =&gt; 'MyModule\Controller\Plugin\MyPlygin'
      ),
  ),
  </code></pre>
  
  <p>So, with that my plugin is accessible from every controller with juste $this->myplugin().</p>
  
  <p>My problem is that I can't call a plugin from a plugin in another module.
  Any idea how to do that?</p>
  
  <p>Thanks</p>