Switch ubuntu to use python3 packages for tempest deps
Switch ubuntu to use python3 packages for tempest deps

Use the package version of the dependencies on Ubuntu rather than try to
install the dependencies from source using pip.

Change-Id: Ifefa99d761eb9157835fc95c6a9b93f9bdb42359

openstack/puppet-openstack-integration,openstack/puppet-openstack-integration,openstack/puppet-openstack-integration