ssh mode: limit run time and memory

[berndbischl]

this would be extremely important, to handle jobs that waste too many resources

options:

1. use the linux timelimit command. there is alo ulimit. maybe also google for more modern approaches

2. the runsolver tool might be the best option

http://jsat.ewi.tudelft.nl/content/volume7/JSAT7_12_Roussel.pdf

https://github.com/automl/HPOlib/tree/master/runsolver

https://www.cril.univ-artois.fr/~roussel/runsolver/