title: Sonar default authentication failing
body: <p>I have a Sonar install running on a windows server using MySql 5.1 </p>
  
  <p>I left my admin password at its default of <strong>admin</strong> and created a second users password all of which worked. After a break of a few months of not really using Sonar I tried to log in and it constantly fails to authenticate on both accounts. </p>
  
  <p>These are the steps I have taken to resolve it:</p>
  
  <ol>
  <li>Update to the latest Sonar 2.8 which successfully updated the database </li>
  <li><p>Set the password with sql I got from the Sonar docs. </p>
  
  <p>update users set crypted_password = '88c991e39bb88b94178123a849606905ebf440f5', salt='6522f3c5007ae910ad690bb1bdbf264a34884c6d' where login = 'admin'</p></li>
  <li>Stopped the MySQLserver to make sure its connecting to the database I'm expecting it too. (It was)</li>
  <li>Set the log level to DEBUG to see if there is anything in the logs but there was nothing.</li>
  </ol>
  
  <p>I know I could drop the database and start from scratch but ideally I would like to keep the 12 months of build history I have. </p>
  
  <p>Any suggestion?  </p>