Slow validation runs/cores setting

[arezoorn]

When requesting the cores for a given basins, that core is used to start 2 CTRL/BEST validation runs. For example, we request a dedicated node and run the model with 36 cores during calibration which is fine. But for validation, there would be two jobs with 36 cores that run in the same dedicated node. I am not sure how it is possible to run jobs requiring more cores than it is available, but I have noticed a slow down in the runs. Easiest solution would be to run CTRL wait until finishes, and then run BEST.