Revert "Remove Gerrit v2.13, plugins and Buck builds"

This reverts commit 91cc091cbeb1f1cb4550c95c403b7bcfda429fcd.

Reason for revert: It isn't working, more testing needed.

Change-Id: Ia69b061bddd28d21613ce356788f460829b0dd79
71 files changed
tree: a1a67b88af30cec87a4e3893e5d5d65fc3158c61
  1. jenkins/
  2. jenkins-docker/
  3. worker/
  4. .gitignore