More backward compatiblity in PhysicsFactoryHelper
More backward compatiblity in PhysicsFactoryHelper

The insanity continues. For both conductivity and viscosity, we need
to check both a fixed physics (heat_transfer and ins, respectively)
as well the current physics.

nicholasmalaya/grins,nicholasmalaya/grins,nicholasmalaya/grins,nicholasmalaya/grins