When deploying the base templates for api-paste, policy files
and other files which are included in the service git source,
we now use the venv files instead of requiring access to a
git source and a complex set of lookups and variable
implementations.
This is simpler and more cross-series, and works from Queens
due to the related bug's patches.
Change-Id: I6a4e2514e66b15b2ae227e62b6dc9ae1a50a4fbd
Related-Bug: #1718356
8367e44230