Delayed message translation currently doesn't work for
messages written from files that import the _ function
directly. For example:
from ceilometer.openstack.common.gettextutils import _
This change uses new support added to oslo that enables
lazy text translation in files where _ is imported
directly.
Implements bp user-locale-api
Change-Id: Ib2189836c6bbeb7e242a77415424fa77af5366f5
b96d4e53f0