add configuration for segment.io key

playbooks/roles/ecommerce/defaults/main.yml

@@ -49,6 +49,7 @@ ECOMMERCE_SOCIAL_AUTH_EDX_OIDC_SECRET : 'some-secret'
 ECOMMERCE_SOCIAL_AUTH_EDX_OIDC_ID_TOKEN_DECRYPTION_KEY : 'some-secret'
 ECOMMERCE_SOCIAL_AUTH_EDX_OIDC_URL_ROOT : 'some-secret'
 ECOMMERCE_SOCIAL_AUTH_REDIRECT_IS_HTTPS: false
+ECOMMERCE_SEGMENT_KEY: !!null
 
 # CyberSource related
 ECOMMERCE_CYBERSOURCE_PROFILE_ID: 'SET-ME-PLEASE'
@@ -99,6 +100,7 @@ ECOMMERCE_SERVICE_CONFIG:
   SOCIAL_AUTH_EDX_OIDC_ID_TOKEN_DECRYPTION_KEY: '{{ ECOMMERCE_SOCIAL_AUTH_EDX_OIDC_ID_TOKEN_DECRYPTION_KEY }}'
   SOCIAL_AUTH_EDX_OIDC_URL_ROOT: '{{ ECOMMERCE_LMS_URL_ROOT }}/oauth2'
   SOCIAL_AUTH_REDIRECT_IS_HTTPS: '{{ ECOMMERCE_SOCIAL_AUTH_REDIRECT_IS_HTTPS }}'
+  SEGMENT_KEY: '{{ ECOMMERCE_SEGMENT_KEY }}'
 
   STATIC_ROOT: "{{ COMMON_DATA_DIR }}/{{ ecommerce_service_name }}/staticfiles"
   # db config