allow auth_extra override for CMS/LMS independently

CHANGELOG.md

@@ -29,3 +29,7 @@
 - Role: Mongo
   - Fixed case of variable used in if block that breaks cluster configuration
     by changing mongo_clustered to MONGO_CLUSTERED.
+
+- Role: Edxapp
+  - Added EDXAPP_LMS_AUTH_EXTRA and EDXAPP_CMS_AUTH_EXTRA for passing unique AUTH_EXTRA configurations to the LMS and CMS. 
+    Both variables default to EDXAPP_AUTH_EXTRA for backward compatibility

playbooks/roles/edxapp/defaults/main.yml

@@ -159,6 +159,8 @@ EDXAPP_PLATFORM_FACEBOOK_ACCOUNT: 'http://www.facebook.com/YourPlatformFacebookA
 
 EDXAPP_ENV_EXTRA: {}
 EDXAPP_AUTH_EXTRA: {}
+EDXAPP_LMS_AUTH_EXTRA: "{{ EDXAPP_AUTH_EXTRA }}"
+EDXAPP_CMS_AUTH_EXTRA: "{{ EDXAPP_AUTH_EXTRA }}"
 EDXAPP_ENABLE_MKTG_SITE: false
 EDXAPP_MKTG_URL_LINK_MAP: {}
 EDXAPP_MKTG_URLS: {}

playbooks/roles/edxapp/templates/cms.auth.json.j2

-{% do cms_auth_config.update(EDXAPP_AUTH_EXTRA) %}
+{% do cms_auth_config.update(EDXAPP_CMS_AUTH_EXTRA) %}
 {% for key, value in cms_auth_config.iteritems() %}
   {% if value == 'None' %}
     {% do cms_auth_config.update({key: None }) %} 

playbooks/roles/edxapp/templates/lms.auth.json.j2

-{% do lms_auth_config.update(EDXAPP_AUTH_EXTRA) %}
+{% do lms_auth_config.update(EDXAPP_LMS_AUTH_EXTRA) %}
 {% for key, value in lms_auth_config.iteritems() %}
   {% if value == 'None' %}
     {% do lms_auth_config.update({key: None }) %}