Creates a roster with the given name and description, if it does not already exist.
This function was designed to run in the Gateway and in Perspective sessions. If creating rosters from Vision clients, use system.alarm.createRoster instead
String name - The name of the roster to create.
String description - The description for the roster. May be None, but the parameter is mandatory.
Gateway, Perspective Session
system roster createRoster, roster.createRoster