Start of implementation of systemtest Relax_disp.test_task_7882_monte_carlo_std_residual, to test doing Monte-Carlo simulations with errors drawn from a
Gauss distribution with a width corresponding to the standard devition of the sum of squares of residuals.
Task #7882 (https://gna.org/task/?7882): Implement Monte-Carlo simulation, where errors are generated with width of standard deviation or residuals.
