This reverts commit 03816fa43363d9162749bf3cf418f788acfee7cc.
This is a partial reapplication of the previously broken change. We make
a small edit to the ansible playbook to run zuul_return in a valid
context. Specifically as a task against localhost.
We also move the infra-prod-bootstrap-bridge dependency into the PPC
because the PPC dependencies override job dpendencies.
Change-Id: Icc2e0871abfed28937eb96bc14bb2be6b0d882d8
990e6ce8a3