Setup for glance.store for translation

Setup configuration for localization and add
initial translation template like it's done for all other OpenStack
projects. Once this is in, the translation bot job
will take care of syncing translations with transifex (already setup).

Note that the proper place for the template is for all python projects
$PROJECT/locale/$PROJECT.pot

Change-Id: If814bcf3e3e98c2d39bfcfd4ffefab308027672c
Merge "Setup for glance.store for translation"