DEVOPS-3050 MAILCHIMP_NEW_USER_LIST_ID settings

playbooks/roles/edxapp/defaults/main.yml

@@ -478,7 +478,7 @@ EDXAPP_ECOMMERCE_API_URL: "http://localhost:8002/api/v2"
 EDXAPP_ECOMMERCE_API_SIGNING_KEY: 'SET-ME-PLEASE'
 
 # Mailchimp Settings
-EDXAPP_MAILCHIMP_NEW_USER_LIST_ID: "None"
+EDXAPP_MAILCHIMP_NEW_USER_LIST_ID: null
 
 #To use AWS S3 as your backend, you need different kwargs:
 # EDXAPP_PROFILE_IMAGE_BACKEND_CONFIG:
@@ -765,7 +765,6 @@ generic_env_config:  &edxapp_generic_env
   LOG_DIR:  "{{ COMMON_DATA_DIR }}/logs/edx"
   JWT_ISSUER: "{{ EDXAPP_LMS_BASE_SCHEME | default('https') }}://{{ EDXAPP_LMS_BASE }}/oauth2"
   JWT_EXPIRATION: '{{ EDXAPP_JWT_EXPIRATION }}'
-  MAILCHIMP_NEW_USER_LIST_ID: "{{ EDXAPP_MAILCHIMP_NEW_USER_LIST_ID }}"
 
   #must end in slash (https://docs.djangoproject.com/en/1.4/ref/settings/#media-url)
   MEDIA_URL:  "{{ EDXAPP_MEDIA_URL }}/"
@@ -912,6 +911,7 @@ lms_env_config:
   PROCTORING_SETTINGS: "{{ EDXAPP_PROCTORING_SETTINGS }}"
   CREDIT_HELP_LINK_URL: "{{ EDXAPP_CREDIT_HELP_LINK_URL }}"
   ELASTIC_SEARCH_CONFIG: "{{ EDXAPP_ELASTIC_SEARCH_CONFIG }}"
+  MAILCHIMP_NEW_USER_LIST_ID: "{{ EDXAPP_MAILCHIMP_NEW_USER_LIST_ID }}"
 
 cms_auth_config:
   <<: *edxapp_generic_auth