deployment: integration/jenkins for Jenkins CI slaves

The repo hold a bunch of wrappers used by Jenkins jobs. We want them git
deployed instead of manually updating the repo on each of the slaves.

bug: 57063
Change-Id: Ibf6e7f8d3a4ff8a827fcef0e12d2e55cdcc96c8d
Merge "deployment: integration/jenkins for Jenkins CI slaves" into production