Updated openstack/openstack
Project: openstack/tempest  d354961d1c427f0690a7571998ac4121449da280

purge xml clients from tempest.clients

This removes the import of xml clients into the tempest clients setup,
now that no XML tests exist this is a safe thing to do.

Change-Id: Ic28d80299f7a7d00a5eada8b70e4423e4f0ac3a4