Added django-parler configuration for discovery service

CHANGELOG.md

+- Role: discovery
+  - Updated LANGUAGE_CODE to generic english. Added configuration for multilingual language package django-parler.
+
 - Role: edxapp
   - Added `EDXAPP_EXTRA_MIDDLEWARE_CLASSES` for configuring additional middleware logic.
 

playbooks/roles/discovery/defaults/main.yml

@@ -57,7 +57,20 @@ DISCOVERY_URL_ROOT: 'http://discovery:{{ DISCOVERY_NGINX_PORT }}'
 DISCOVERY_LOGOUT_URL: '{{ DISCOVERY_URL_ROOT }}/logout/'
 
 DISCOVERY_SECRET_KEY: 'Your secret key here'
-DISCOVERY_LANGUAGE_CODE: 'en-us'
+
+DISCOVERY_LANGUAGE_CODE: 'en'
+
+## Configuration for django-parler package. For more information visit
+## https://django-parler.readthedocs.io/en/latest/configuration.html#parler-languages
+DISCOVERY_PARLER_DEFAULT_LANGUAGE_CODE: '{{DISCOVERY_LANGUAGE_CODE}}'
+DISCOVERY_PARLER_LANGUAGES :
+  1:
+    - code: 'en'
+  default:
+    fallbacks:
+      - '{{DISCOVERY_PARLER_DEFAULT_LANGUAGE_CODE}}'
+    hide_untranslated: 'False'
+
 DISCOVERY_DEFAULT_PARTNER_ID: 1
 DISCOVERY_SESSION_EXPIRE_AT_BROWSER_CLOSE: false
 
@@ -127,5 +140,9 @@ discovery_service_config_overrides:
 
   OPENEXCHANGERATES_API_KEY: '{{ DISCOVERY_OPENEXCHANGERATES_API_KEY }}'
 
+  LANGUAGE_CODE: '{{DISCOVERY_LANGUAGE_CODE}}'
+  PARLER_DEFAULT_LANGUAGE_CODE: '{{DISCOVERY_PARLER_DEFAULT_LANGUAGE_CODE}}'
+  PARLER_LANGUAGES : '{{DISCOVERY_PARLER_LANGUAGES}}'
+
 # See edx_django_service_automated_users for an example of what this should be
 DISCOVERY_AUTOMATED_USERS: {}