The builtin _ should not longer be used. Instead _
should be explicitly assigned from glance.i18n.
This patch does the following:
(1) adds these explict assignments to any
glance file that was missing them,
(2) removes the defintion of _ as a builtin from
tox.ini so that a pep8 failure will occur
if _ is not defined,
(3) removes calls to install().
This removes the last direct use of gettextutils by glance.
The indirect uses, via openstack/common, will be removed
in the next sync with oslo.
Change-Id: Ie54e8a67e747e022cc01022dfad35d89686bdfc4
3f2a56ae65