Create PBS/TORQUE driver to have the 'pbs' queue system option

[heitorsf]

Issue
Hi, as a user I would like to have PBS (TORQUE) as an option for queue system so that I can run ERT through Everest in a HPC Cluster with PBS, as I can do today with ERT alone (to run Eclipse/OPM Flow).

Definition of done
When there is a PBS/TORQUE driver that can be used by setting the keyword queue_system of simulador to 'pbs'.

[oyvindeide]

Hi and thanks for creating the the feature request! Not sure at the moment how much work this would be, but we will look into it.