Add cxserver role for production

Create the cxserver role for production similar to Beta for cxserver and
mostly based on Mathoid. In addition this role has,

* log_dir is /var/log/cxserver,
* No jenkins/contint includes,
* Added monitoring for port 8080,
* Fixed description.

Bug: T78629
Change-Id: If30737aa255ef8eeb7b51a865abef405086a9c97
Merge "Add cxserver role for production" into production