Allow the option to not update resolv.conf and network options. This is ...

...useful for enterprise environments where those options are possibly managed though other config management options and may not be ideal for the particular openshift deployment.
How about update_network_conf_files or update_dns_resolv_conf?  update_conf_files is a bit too generic.  

Also, you will need to add the parameter to the class definition and update README.asciidoc to reference the new option.