Triple verify changes parallelism to leverage extra slaves

There are now 6 slaves with 4 parallel VMs executors each,
which gives us triple power for running many more parallel
changes verifications at the same time.

Change-Id: Ic9180b1bcf1d55e62245f24813c67f27db300407
1 file changed
tree: b582328cb38870119964f308bb64752876f07e9c
  1. jenkins/
  2. jenkins-docker/
  3. .gitignore