[settings][settings] Update context processors

The request processor has been moved from django.core to
django.template.

beat/web/settings/settings.py

@@ -300,7 +300,7 @@ TEMPLATES = [
         'OPTIONS': {
             'context_processors': [
                 'django.contrib.auth.context_processors.auth',
-                'django.core.context_processors.request',
+                'django.template.context_processors.request',
                 'django.template.context_processors.csrf',
                 'django.contrib.messages.context_processors.messages',
                 'beat.web.navigation.context_processors.exported_settings',