title: opennebula upgrade unable to parse oned.conf
body: <p>I'm trying to upgrade OpenNebula from 5.10 to 5.12.  I'm on step 7 of <a href="http://docs.opennebula.io/5.12/intro_release_notes/upgrades/upgrading_single.html" rel="nofollow noreferrer">these instructions</a>, but the database upgrade falls down:</p>
  
  <pre><code>$ sudo onedb upgrade -v
  Unable to parse oned.conf: undefined method `chomp' for true:TrueClass
  </code></pre>
  
  <p>I'm not sure what's going wrong here.  Is there a way to get more information about where the error is (which line in oned.conf, for example)?</p>