Fix typo from EDXAPP_COURSE_* to EDXAPP_COURSES_*

playbooks/roles/edxapp/defaults/main.yml

@@ -226,8 +226,8 @@ EDXAPP_CMS_SSL_NGINX_PORT: 48010
 
 # NGINX Rate limiting related vars
 EDXAPP_ENABLE_RATE_LIMITING: false
-EDXAPP_COURSE_REQUEST_RATE: '5r/s'
-EDXAPP_COURSE_REQUEST_BURST_RATE: 10
+EDXAPP_COURSES_REQUEST_RATE: '5r/s'
+EDXAPP_COURSES_REQUEST_BURST_RATE: 10
 
 EDXAPP_LANG: 'en_US.UTF-8'
 EDXAPP_LANGUAGE_CODE : 'en'

playbooks/roles/nginx/templates/edx/app/nginx/sites-available/lms.j2

@@ -198,7 +198,7 @@ error_page {{ k }} {{ v }};
   location /courses {
     {%- if EDXAPP_ENABLE_RATE_LIMITING -%}
     # Set Limit
-    limit_req zone=cookies burst={{ EDXAPP_COURSE_REQUEST_BURST_RATE }};
+    limit_req zone=cookies burst={{ EDXAPP_COURSES_REQUEST_BURST_RATE }};
     error_page  503 = /server/rate-limit.html;
     {%- endif -%}