Ensure that role tests pin pip/setuptools/wheel
Ensure that role tests pin pip/setuptools/wheel

Currently the role tests use whatever versions of pip,
setuptools and wheel are already installed on the host.

When a version of these tools changes it often causes
problems for our testing.

This will ensure that we use a known good set of pins
which is maintained in the general SHA bumping process.

Change-Id: Id5c240ecc512358eec390f265c7e55c2324dd2e5

openstack/openstack-ansible-rsyslog_client,openstack/openstack-ansible-rsyslog_client