Forward most Batsim options to the decision process

It would be interesting that decision processes know what Batsim simulates and what constraints they should respect. Whether energy is enabled and hosts can be shared should for example be forwarded, as proposed there.

Quick fix proposal:

• add batsim CLI arguments into SimulationBegins.
  This is not robust to Batsim CLI changes and in the long run we probably want to have a clean model of what decisions are allowed or not,
  but the possibility to read Batsim CLI arguments from the protocol can be useful per se.