Reset configuration YAML files to install defaults

playbooks/edx-west/carnegie-prod-app.yml

 #- hosts: ~tag_Name_app(10|20)_carn
 - hosts: ~tag_Name_app10_carn
+#- hosts: ~tag_Name_app20_carn
   sudo: True
   vars_prompt:
     - name: "migrate_db"

playbooks/edx-west/cme-prod-app.yml

@@ -15,6 +15,7 @@
 # or we can get subsets of them by name
 #- hosts: ~tag_Name_app(10|20)_cme
 - hosts: ~tag_Name_app10_cme
+#- hosts: ~tag_Name_app20_cme
   sudo: True
   vars_prompt:
     - name: "migrate_db"

playbooks/edx-west/prod-worker.yml

 # For all util machines
-#- hosts: tag_environment_prod:&tag_function_util
+- hosts: tag_environment_prod:&tag_function_util
 # or we can get subsets of them by name
-- hosts: ~tag_Name_util10_prod
+#- hosts: ~tag_Name_util10_prod
   sudo: True
   vars:
     # this indicates the path to site-specific (with precedence)