renamed and consolidated MFDs using total catalog rate

stable-crust/grid/ceus-stable/mfd-map.json

...crust/grid/ceus-stable/sscn/gk/adaptive/rupture-sets.json

...le-crust/grid/ceus-stable/sscn/gk/fixed/rupture-sets.json

...crust/grid/ceus-stable/sscn/nn/adaptive/rupture-sets.json

...le-crust/grid/ceus-stable/sscn/nn/fixed/rupture-sets.json

...rust/grid/ceus-stable/sscn/r85/adaptive/rupture-sets.json

...e-crust/grid/ceus-stable/sscn/r85/fixed/rupture-sets.json

...crust/grid/ceus-stable/usgs/gk/adaptive/rupture-sets.json

...le-crust/grid/ceus-stable/usgs/gk/fixed/rupture-sets.json

...crust/grid/ceus-stable/usgs/nn/adaptive/rupture-sets.json

...le-crust/grid/ceus-stable/usgs/nn/fixed/rupture-sets.json

...rust/grid/ceus-stable/usgs/r85/adaptive/rupture-sets.json

...e-crust/grid/ceus-stable/usgs/r85/fixed/rupture-sets.json