Modified systemtest 'test_estimate_r2eff_err_auto', to use the GUI script.
It seems to work Ãperfect.
This is to test against GUI script: test_r2eff_err_estimate
task #7822(https://gna.org/task/index.php?7822): Implement user function to estimate R2eff and associated errors for exponential curve fitting.
Authored by: tlinnet 2014-08-28
Parent: [r25366]
Child: [r25368]
