The default values are used in the auto-analysis in the test suite to avoid the grid search. The
changed values affected the optimisation of two spins from Flemming Hansen's data located at
test_suite/shared_data/dispersion/Hansen/, residue 4 used as an example of no exchange and residue
70 used as an example where data is only available at one field. The system test
Relax_disp.test_set_grid_r20_from_min_r2eff_cpmg was also modified as it was directly checking these
default values.
