title: Start running Jenkins jobs simultaneously in sync
body: <p>Is it possible to start running Jenkins jobs <strong>simultaneously</strong> in such way that in case when some of the configurations couldn't be started "parent" job waits until all of them could be initiated in sync?</p>
  
  <p>I've already checked <a href="https://wiki.jenkins-ci.org/display/JENKINS/Matrix+Project+Plugin" rel="nofollow">Matrix Project</a> and <a href="https://wiki.jenkins-ci.org/display/JENKINS/Pipeline+Plugin" rel="nofollow">Pipeline</a> plug-ins for starting jobs in parallel, but it seems both of them are missing possibility to freeze execution until all configuration could be started at the same time.  </p>