Add auto mapping feature for hex geometries between neutronics and thermal hydraulics models. CAMP item #147

[NRCgg]

Mazzini Guido noted that they are working on a Python script to perform the automapping for hexagonal cores and that he will provide this when it is ready. Nathanael Hudson indicated that they have test problems for Cartesian geometry, and they are considering moving all of this capability, for both Cartesian and hexagonal geometries, to SNAP. He further noted that NRC staff have developed their own scripts to do this as well. In addition, there can be very complicated mappings for some models, therefore they need to decide on what capability they want SNAP to handle.