These translation sections are not needed anymore, Babel can
generate translation files without them.
Remove babel.cfg as well, this is the default role and not needed
anymore.
also remove Babel from requirements[1]
[1] http://lists.openstack.org/pipermail/openstack-discuss/2020-April/014227.html
Change-Id: I106c408a394ce8018c11560a60fe1a160b898ec3
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