refactoring common inclusion based on comments

removing motd template from common

Removing sshd template

relocating temlates

relocating templates

Relocating dhclient templates

explicit play depends

Update responsibilities

indent

further dependency updates

additional updates

Common dependency for server utils

Supervisor is required for role integrity

Typos

further template ownership changes

This should arguably just be removed, or moved to another
role, so common can be run anywhere including places
where sshd is not running, e.g., Docker containers.

This includes grabbing Dockerfile from dockerhub as well as loading edx
users into db.  The db VOLUME is not shared at this point.