Update lms-xml site to not be a copy of lms-preview

playbooks/roles/nginx/templates/lms-xml.j2

@@ -3,8 +3,8 @@ server {
 
   listen 80;
 
-  server_name trace-lms-preview.*
-              preview.lms-dev.m.edx.org;
+  server_name trace-lms-xml.*
+              xml.lms-dev.m.edx.org;
 
   #
   # Send error response when request host isn't under our control
@@ -40,21 +40,21 @@ server {
     proxy_set_header Host $http_host;
 
     proxy_redirect off;
-    proxy_pass http://lms-preview-backend;
+    proxy_pass http://lms-xml-backend;
   }
 
   location / {
-    try_files $uri @proxy_to_lms-preview_app;
+    try_files $uri @proxy_to_lms-xml_app;
   }
 
   # No basic auth security on the github_service_hook url, so that github can use it for cms
   location /github_service_hook {
-    try_files $uri @proxy_to_lms-preview_app;
+    try_files $uri @proxy_to_lms-xml_app;
   }
 
   # No basic auth security on the heartbeat url, so that ELB can use it
   location /heartbeat {
-    try_files $uri @proxy_to_lms-preview_app;
+    try_files $uri @proxy_to_lms-xml_app;
   }
 
   # Check security on this