This allows to import old varlink based podman client
ase podman1 while keeping safe to install the new
client podman-py package as podman.
To archive such result it first temporarly rename existing podman
dir, then install podman package on its place, renames it as
podman1, and finally restore pre-existing podman directory
if any initially found.
Change-Id: If834cc383f11e656f17e49d5e6fa401ac8bee829