Merge pull request #855 from edx/cg/add_cas_variables

Added CAS settings to edxapp

playbooks/roles/edxapp/defaults/main.yml

@@ -57,6 +57,9 @@ EDXAPP_CELERY_PASSWORD: 'celery'
 
 EDXAPP_PLATFORM_NAME: 'edX'
 
+EDXAPP_CAS_SERVER_URL: ''
+EDXAPP_CAS_EXTRA_LOGIN_PARAMS: ''
+
 EDXAPP_FEATURES:
   AUTH_USE_OPENID_PROVIDER: true
   CERTIFICATES_ENABLED: true
@@ -372,7 +375,8 @@ generic_env_config:  &edxapp_generic_env
   DEFAULT_FEEDBACK_EMAIL: $EDXAPP_DEFAULT_FEEDBACK_EMAIL
   SERVER_EMAIL: $EDXAPP_DEFAULT_SERVER_EMAIL
   BULK_EMAIL_DEFAULT_FROM_EMAIL: $EDXAPP_BULK_EMAIL_DEFAULT_FROM_EMAIL
-
+  CAS_SERVER_URL: $EDXAPP_CAS_SERVER_URL
+  CAS_EXTRA_LOGIN_PARAMS: $EDXAPP_CAS_EXTRA_LOGIN_PARAMS
 
 lms_auth_config:
   <<: *edxapp_generic_auth