add some vars for smtp backend

add some vars for smtp backend

playbooks/roles/edxapp/defaults/main.yml

@@ -47,6 +47,11 @@ EDXAPP_MYSQL_HOST: 'localhost'
 EDXAPP_MYSQL_PORT: '3306'
 
 EDXAPP_EMAIL_BACKEND: 'django.core.mail.backends.smtp.EmailBackend'
+EDXAPP_EMAIL_HOST: 'localhost'
+EDXAPP_EMAIL_PORT: 25
+EDXAPP_EMAIL_USE_TLS: False
+EDXAPP_EMAIL_HOST_USER: ''
+EDXAPP_EMAIL_HOST_PASSWORD: ''
 
 EDXAPP_LOG_LEVEL: 'INFO'
 
@@ -387,6 +392,8 @@ edxapp_generic_auth_config:  &edxapp_generic_auth
     grading_controller:  'grading_controller'
     username: $EDXAPP_OEE_USER
   ANALYTICS_API_KEY:  $EDXAPP_ANALYTICS_API_KEY
+  EMAIL_HOST_USER: $EDXAPP_EMAIL_HOST_USER
+  EMAIL_HOST_PASSWORD: $EDXAPP_EMAIL_HOST_PASSWORD
   ZENDESK_USER: $EDXAPP_ZENDESK_USER
   ZENDESK_API_KEY: $EDXAPP_ZENDESK_API_KEY
   CELERY_BROKER_USER: $EDXAPP_CELERY_USER
@@ -412,6 +419,9 @@ generic_env_config:  &edxapp_generic_env
   LOCAL_LOGLEVEL: $EDXAPP_LOG_LEVEL
   # default email backed set to local SMTP
   EMAIL_BACKEND: $EDXAPP_EMAIL_BACKEND
+  EMAIL_HOST: $EDXAPP_EMAIL_HOST
+  EMAIL_PORT: $EDXAPP_EMAIL_PORT
+  EMAIL_USE_TLS: $EDXAPP_EMAIL_USE_TLS
   FEATURES: $EDXAPP_FEATURES
   WIKI_ENABLED: true
   SYSLOG_SERVER:  $EDXAPP_SYSLOG_SERVER