Always use Mu and BMu (one-loop) to calculate the tree-level masses,
just as Softsusy does it.  However, now the GUT scale differs by 30%,
which affects all soft parameters and therefore all masses.

Note: If you want to compare Softsusy and FlexibleSUSY iteration by
iteration, please make sure you call
calculate_DRbar_yukawa_couplings() after you've set the VEVs (in
MSSM_low_scale_constraint::apply()).  I.e., calculate the Yukawa
couplings using the new VEVs (instead of the VEVs from the previous
iteration).
rename test case