DIB does not currently have any translations or translatable strings,
so removing local configuration from setup.cfg.
Additionally, Babel is only required if you import it directly,
removing it as well.
Change-Id: I036de97641df38eef408290b50cecfe216c69f6d
Create a tox environment for running the unit tests against the lower
bounds of the dependencies.
Create a lower-constraints.txt to be used to enforce the lower bounds
in those tests.
Add openstack-tox-lower-constraints job to the zuul configuration.
See http://lists.openstack.org/pipermail/openstack-dev/2018-March/128352.html
for more details.
Change-Id: I911c66b2e9971a3e134c482a4b4ffa529d358a76
Depends-On: https://review.openstack.org/555034
Signed-off-by: Doug Hellmann <doug@doughellmann.com>