fixed test settings error

.travis.yml

@@ -12,7 +12,7 @@ env:
     - DJANGO=1.7.8
 
 install:
-  - pip install -q django==$DJANGO --use-mirrors
+  - pip install -q django==$DJANGO
   - pip install -r requirements.txt
   - pip install pytest-django simplejson pytz coverage coveralls
   - python setup.py install

django_q/tests/settings.py

@@ -37,7 +37,6 @@ INSTALLED_APPS = (
     'django.contrib.sessions',
     'django.contrib.messages',
     'django.contrib.staticfiles',
-    'django_extensions',
     'django_q'
 )
 
@@ -104,4 +103,4 @@ USE_TZ = True
 STATIC_URL = '/static/'
 
 # Django Q specific
-#Q_PREFIX = 'test_django_q'
+Q_PREFIX = 'test_django_q'