Use CfgORBAT class property to determine formation deployment payload

[jmlane]

Instead of hardcoded composition files per formation size, let's parse the CfgORBAT for a deployment property to determine how to deploy the formation at runtime.

[jmlane]

I think going with a string that compiles to code is probably the most flexible. Adding additional properties later for default handling of different types of values can be added to the backlog.