disable basic auth on course assets

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

@@ -171,6 +171,14 @@ error_page {{ k }} {{ v }};
     try_files $uri @proxy_to_lms_app;
   }
 
+  # No basic auth security on assets
+  location /c4x {
+    try_files $uri @proxy_to_lms_app;
+  }
+
+  location /asset {
+    try_files $uri @proxy_to_lms_app;
+  }
 
   # No basic auth security on the heartbeat url, so that ELB can use it
   location /heartbeat {