message: better end2end
diff: node {
  stage ('Checkout') {
  + deleteDir()
  checkout scm
  }
  ansiColor('xterm') {
  stage ('run test') {
  try {
  - sh "make end2end-tests -j4"
  + sh "make end2end-tests -j1"
  } catch (e) {
  echo "Something went wrong, trying to cleanup"
  sh "make end2end-tests/clean"
  