Some changes like customiszble interface to be used
Merge branch 'cost_model_preemption' of https://github.com/gustafa/firmament into cost_model_preemption
Merge branch 'cost_model_preemption' of https://github.com/gustafa/firmament into cost_model_preemption
Merge branch 'cost_model_preemption' of https://github.com/gustafa/firmament into cost_model_preemption
Merge branch 'cost_model_preemption' of https://github.com/gustafa/firmament into cost_model_preemption
Fixing stupid webloadgenerator bugs
Merge branch 'cost_model_preemption' of https://github.com/gustafa/firmament into cost_model_preemption