The commands need to be run as root.
Also adds a test job for the docker image build so that zuul will run
the experimental job to test before merging.
Change-Id: I1d1cb6979865d7ef22587315544f39646bc9d49d
Closes-Bug: #1765421
The wrong inventory name was being used in the post playbook for the
docker image build. This fixes that.
Change-Id: Ib416068016a663c7440f61fa0194f92eea1bee16