title: Update SVN credentials in jenkins
body: <p>We have upgraded our instances of Jenkins(new .WAR) and it’s Subversion Plugin.
  and then we come to know that it is behaving differently in the new setup.</p>
  
  <p>every job must have its SVN credentials established.
  In this scenario we are updating SVN credentials for each and every job for instance.</p>
  
  <p>Is there any way to upgrade our SVN credentials one time for every project and for every job??</p>