Updated openstack/openstack
Project: openstack/oslo.db  664a4e1e2fcb3047bc4d5c9c216cbb091504cc0c

Activate pep8 check that _ is imported

Remove the specification in tox.ini that _ is a builtin so that
it will no longer assume that _ does not need to be imported.

This helps ensure that the _ from i18n is used.

Activating this check did not flag any violations.

Change-Id: Idc4d6259d4eb2db66e7122535bc42f8647049a06