Fix Subversion plugin configuration in Jenkins in all jobs

jenkins_fix_scm.groovy

// Modify SVN related in memory objects
for(item in Hudson.instance.items) {
  def scm = item.scm
  if((scm instanceof org.jenkinsci.plugins.multiplescms.MultiSCM) ) {
    println('##########')
    for(s in scm.scms) {
      if( s instanceof hudson.scm.SubversionSCM) {
       // Change updater
       s.workspaceUpdater = new hudson.scm.subversion.UpdateUpdater()
       println(s.workspaceUpdater.dump())
       // Turn fail on external on all locations
       s.locations.each { it.externalFailOption = true ;  println(it.dump()) }
      }
    }
  }

// Now save all the jobs to make the change persistent 
jobs = Hudson.instance.items.findAll{job -> job.name}
jobs.each{
  it.save() 
}