Expand simulation run robustness

[PaulScheerRLI]

The modular approach of the ebus toolbox can often fail, if a single modul fails/ throws an exception. This can happen especially in fast developing environments like ours, e.g. incompatible version of spice ev<--> ebus toolbox. In my opinion modules, e.g. cost_calculation, should take care of catching errors on a macro scale to allow simulations to finish even if the single module fails. Warnings should be printed accordingly.

[stefansc1]

implemented in #125