title: Symfony 2.8 - Doctrine schema force only selected entities
body: <p>I'm currently in a situation where I have two databases (one MySQL and SQLite database). I'm using the SQLite database only for two log entities which I need to keep separate from the main (MySQL) database. Is there any possibility to update the SQLite database only with those two entities and leave the MySQL database untouched? I can't find any command for that.</p>
  
  <p>However, I found the following options:</p>
  
  <ol>
  <li>Use doctrine schema update force on both the SQLite and MySQL database. The downside of this solution is that I pollute the SQLite with the rest of the schema and the MySQL database with the two log entities.</li>
  <li>Put the two log entities into a separate bundle so that I can call schema update only on a particular bundle.</li>
  </ol>
  
  <p>Although these solutions solve the problem, they aren't really optimal. <strong>Is there any possibility to update only certain entities for a certain entity manager?</strong></p>