Cleans up the translation

Replaces translation.ungettext_lazy with
ungettext_lazy by importing ungettext_lazy from django.utils.translation
Replaces translation.ugettext_lazy with _
by importing ugettext_lazy as _ from django.utils.translation

Closes-Bug: 1351478

Change-Id: I1b0415bcd5d9b5b0e3f1328f0289c4ca381e02cd
Merge "Cleans up the translation"