Ensure translation is initialized
Ensure translation is initialized

I found when trying to run individual unit tests (not as part of
tox which includes test discovery) then the _() method was not
initialized for translation.

The *aas projects initialize it in their __init__ module like
neutron, and that solves it here too.

Change-Id: I11a02cc558f71223139508c468e24747fe190a27

Gitweijie/first_project,noironetworks/networking-cisco,CiscoSystems/networking-cisco,noironetworks/networking-cisco,Tehsmash/networking-cisco,Gitweijie/first_project,openstack/networking-cisco,Tehsmash/networking-cisco,openstack/networking-cisco,CiscoSystems/networking-cisco