Refactor of explored solutions results

[JonasBerx]

Every simulation we perform creates a copy of the sim parameters and constraints parameters. Those need to be removed from files and be kept in memory to function in the webservice.

• Remove all write functions for the relevant json files
• Refine the sim_params & constraints_params classes
• When a new point for the pareto is found, only keep the points that are actually in the pareto.
• After the optimization finishes, save the remaining parameter objects for the end user to read.