jenkins: add build blocker plugin

This allows us to have >1 executors on x86 without trying to build images in parallel.

jenkins: add build blocker plugin
This allows us to have >1 executors on x86 without trying to build images in parallel.
258404d2 · Guido Gunther · 32f41f95 · 258404d2
Commit 258404d2 authored May 17, 2018 by Guido Gunther
--- a/group_vars/jenkinsmaster
+++ b/group_vars/jenkinsmaster
 jenkins_plugins:
  - ansicolor
+  - build-blocker-plugin
  - cloudbees-folder
  - git
  - greenballs