This is a community goal for Ocata. We're already not using any of
the code, but there are some other files and references left over.
These files used to be installed from oslo-incubator:
tools/install_venv.py
tools/install_venv_common.py
tools/with_venv.sh
They were meant to be used by the legacy run_tests.sh, which does not
exist in this repo.
Change-Id: Ib8758ee8c579b2d3a64f3d47611865ac14b3490f
Partial-Bug: #1639103
e8365acea0