Merge pull request #1101 from edx/feanil/cms_nginx

Update CMS Hostname to be more liberal.

CHANGELOG.md

-Start a change log to keep track of backwards incompatible changes and deprecations.
+- Update CMS_HOSTNAME default to allow any hostname that starts with `studio` along with `prod-studio` or `stage-studio`.
+
+- Start a change log to keep track of backwards incompatible changes and deprecations.

playbooks/roles/nginx/defaults/main.yml

@@ -29,7 +29,7 @@ nginx_debian_pkgs:
   - nginx
   - python-passlib
 
-CMS_HOSTNAME: '~^((stage|prod)-)?studio\..*'
+CMS_HOSTNAME: '~^((stage|prod)-)?studio.*'
 
 nginx_template_dir: "edx/app/nginx/sites-available"