configure puppet-module-unit tests for zuul

This commit attempts to fix the unit test gates
by adding a few parameters that are required
for zuul to build the jobs.

Change-Id: I8b9c14b1be636e82dbfc3f88b6501813aff41d4c
Reviewed-on: https://review.openstack.org/26393
Reviewed-by: Jeremy Stanley <fungi@yuggoth.org>
Reviewed-by: Paul Belanger <paul.belanger@polybeacon.com>
Approved: James E. Blair <corvus@inaugust.com>
Reviewed-by: James E. Blair <corvus@inaugust.com>
Tested-by: Jenkins