This migrates the above files from tempest. This includes tempest commits:
* versions.py: I70294329870de46b2c4c8775a1d7920bee403954
* versions_client.py: I70294329870de46b2c4c8775a1d7920bee403954
to see the commit history for these files refer to the above Change-Ids in the tempest repository
Partially implements blueprint migrate-service-clients-to-tempest-lib
Change-Id: I41ec60e12a155ee80f3a1825405bdd6e1ec82425