Builder.py: Use future-proof interface to set implements_process, required_resources, implements_protocol

[phstratmann]

User story

As a user, I want to ensure that the solvers will also run in case that the Process decorators are integrated differently in the future. But at the moment, the builder.py replaces decorators in this non-future-proof way:
setattr(solver_model, "implements_process", self.solver_process) # Get requirements of parent class
super_res = solver_model.required_resources.copy() # Set new requirements not overwriting parent class requirements. setattr(solver_model, "required_resources", super_res + requirements)
setattr(solver_model, "implements_protocol", protocol)

Conditions of satisfaction

• Above-mentioned code should use the clean interface developed as solution to issue #580