Remove last known dollar vars.

playbooks/roles/edxapp/defaults/main.yml

@@ -534,7 +534,7 @@ generic_env_config:  &edxapp_generic_env
   COURSES_WITH_UNSAFE_CODE: "{{ EDXAPP_COURSES_WITH_UNSAFE_CODE }}"
   BULK_EMAIL_EMAILS_PER_TASK: "{{ EDXAPP_BULK_EMAIL_EMAILS_PER_TASK }}"
   MICROSITE_ROOT_DIR: "{{ EDXAPP_MICROSITE_ROOT_DIR }}"
-  MICROSITE_CONFIGURATION: $EDXAPP_MICROSITE_CONFIGURATION
+  MICROSITE_CONFIGURATION: "{{ EDXAPP_MICROSITE_CONFIGURATION }}"
   GRADES_DOWNLOAD:
     STORAGE_TYPE: "{{ EDXAPP_GRADE_STORAGE_TYPE }}"
     BUCKET: "{{ EDXAPP_GRADE_BUCKET }}"
@@ -634,7 +634,7 @@ lms_auth_config:
 
 lms_env_config:
   <<: *edxapp_generic_env
-  PAID_COURSE_REGISTRATION_CURRENCY: $EDXAPP_PAID_COURSE_REGISTRATION_CURRENCY
+  PAID_COURSE_REGISTRATION_CURRENCY: "{{ EDXAPP_PAID_COURSE_REGISTRATION_CURRENCY }}"
   SITE_NAME:  "{{ EDXAPP_LMS_SITE_NAME }}"
   VIDEO_CDN_URL: "{{ EDXAPP_VIDEO_CDN_URLS }}"
   CODE_JAIL: