We use an SSH bastion host which we do our deployment through. The
deployment host doesn't have direct access to the same network as the
host. As a result the venv local checksum lookup fails.
I have described this here:
https://bugs.launchpad.net/openstack-ansible/+bug/1689283
This is a simple fix for this problem, assuming everything is good it
will need repeating in multiple places in the code base.
Change-Id: Iad45d165a6b5c351fe26a9859862d8e04053cc74
(cherry picked from commit 9ae3404464)