This commit uses the pattern established in [1] to remove the venv
activation code by using the correct venv Python interpreter instead.
Note that using python-path in keystone-httpd.conf.j2 does not achieve
full isolation from the host's python installation as we'd hope (the
path will still include /usr/local/lib/python2.7/dist-packages and
/usr/lib/python2.7/dist-packages), but every attempt at using
python-home failed due to the venv interpreter not being able to find
argparse. We will need to spend some additional cycles here trying to
solve this as locking the venv interpreter into its own site-packages
is the best solution long-term.
[1] https://review.openstack.org/#/c/273943/
Change-Id: I441d8e488d9396583b4fafd454d14bc3fce20eb1
(cherry picked from commit 36486b16b4)
2aea859b2d