Fix regression in translating anything at all

Fix regression in translating anything at all

In commit 840ee20 (Rename translation resources from aur to aurweb,
2018-07-07) the translations file was renamed but we never actually
switched to using the renamed translations.

As a result, every single push to the AUR contains the following
traceback:

    remote: Traceback (most recent call last):
    remote:   File "/usr/bin/aurweb-notify", line 11, in <module>
    remote:     load_entry_point('aurweb==4.7.0', 'console_scripts', 'aurweb-notify')()
    remote:   File "/usr/lib/python3.6/site-packages/aurweb-4.7.0-py3.6.egg/aurweb/scripts/notify.py", line 541, in main
    remote:   File "/usr/lib/python3.6/site-packages/aurweb-4.7.0-py3.6.egg/aurweb/scripts/notify.py", line 69, in send
    remote:   File "/usr/lib/python3.6/site-packages/aurweb-4.7.0-py3.6.egg/aurweb/scripts/notify.py", line 56, in get_body_fmt
    remote:   File "/usr/lib/python3.6/site-packages/aurweb-4.7.0-py3.6.egg/aurweb/scripts/notify.py", line 192, in get_body
    remote:   File "/usr/lib/python3.6/site-packages/aurweb-4.7.0-py3.6.egg/aurweb/l10n.py", line 14, in translate
    remote:   File "/usr/lib/python3.6/gettext.py", line 514, in translation
    remote:     raise OSError(ENOENT, 'No translation file found for domain', domain)
    remote: FileNotFoundError: [Errno 2] No translation file found for domain: 'aur'

Signed-off-by: Eli Schwartz <eschwartz@archlinux.org>
Signed-off-by: Lukas Fleischer <lfleischer@archlinux.org>