title: Perform maven release on jenkins fails cause of locked svn files
body: <p>I have a Multi-Module-Maven build job on jenkins. Jenkins is running on win2008 Server. A jenkins-slave, which does the work, is also running on a win2008 Server.
  Perform maven release on jenkins fails cause of locked svn files:</p>
  
  <pre><code>The svn command failed.
  Command output:
  svn: E155004: Commit failed (details follow):
  svn: E155004: Working copy 'C:\Users\jenkins\workspace\MavenDemoDeploy' locked.
  svn: E155004: 'C:\Users\jenkins\workspace\MavenDemoDeploy' is already locked.
  </code></pre>
  
  <p>If I make the initial checkout and maven release build on command-line everything works fine.
  If I make the release build on jenkins for a single maven module everything works fine.</p>
  
  <p><strong>Update:</strong>
  I configured the release-plugin to use the svnkit, so it is the same client as jenkins use to checkout. I also configured preparationGoals to make a 'svn cleanup' (the cleanup works) without any success.</p>