Monkey patch 'django.utils.translation'

Modify Django's translation library, such that the gettext family of
functions return an empty string when attempting to translate a
falsey value. This overrides the default behavior [0]:
> It is convention with GNU gettext to include meta-data as the
> translation for the empty string.

This patch provides a holistic solution to replace the current piecemeal
approach [1][2].

Affected Methods:
    - gettext
    - ugettext

[0] https://docs.python.org/2.7/library/gettext.html#the-gnutranslations-class
[1] bad803e451
[2] https://github.com/edx/edx-platform/pull/4653

cms/startup.py

@@ -7,12 +7,15 @@ from django.conf import settings
 settings.INSTALLED_APPS  # pylint: disable=W0104
 
 from django_startup import autostartup
+from monkey_patch import django_utils_translation
 
 
 def run():
     """
     Executed during django startup
     """
+    django_utils_translation.patch()
+
     autostartup()
 
     add_mimetypes()