This testdef is used to test a stealth feature in mpaso and mpassi introduced
by PR #6696. It simply changes sets the following namelist option in mpaso
to true
   config_scale_dismf_by_removed_ice_runoff
and the following namelist option in mpassi to true
   config_scale_dib_by_removed_ice_runoff
These flags only makes sense to use in a B-case runs with data icebergs (DIB)
and data ice-shelf melt fluxes (DISMF).
