bound behaviour for irace's target-runner

[DE0CH]

Current Logic

check the [bound] in irace's target-runner. If the surrogate predicts larger than bound, return bound + 1, else return the surrogate prediction

For context, irace's target-runner command line args

<id.configuration> <id.instance> <seed> <instance> [bound] <configuration>

Future Task

A better solution would be to check if "prediction>=bound" and "status=timeout" (the surrogate returns some extra info, I think we looked into it previously). This is to avoid cases where the prediction is exactly as bound, i.e., cplex solves the instance within exactly [bound] time, but I think it's unlikely, so we may be able to skip that.

This is not needed for now, we can just skip it and add it in later if needed.

[ndangtt]

@DE0CH: based on Manuel's reply:
MLopez-Ibanez/irace#66 (comment)

we should return bound + 0.1 in the target-runner (for both fields: solution quality and runtime) if the surrogate returns timeout.