Fix plugin versions

Running the jenkins master docker image without existing config
failed, because the downloaded plugins (latest version) weren't
compatible with Jenkins 2.25.

This change fixes the plugin versions to the versions currently
deployed on gerrit-ci.gerritforge.com

Change-Id: Iff7f3290c8e329ad45a5d9afe464944f6fb177e2
1 file changed
tree: e91452ee1ae39f8a81394ceb2098c27268ba7bff
  1. jenkins/
  2. jenkins-docker/
  3. worker/
  4. .gitignore