Adding check to make sure ROCSampling is smaller than available fpr values

This MR adds a check that crashes the code in case ROCSampling is larger than the available amount of tpr or fpr points.

assigned to @skorn

enabled an automatic merge when the pipeline for 8b5b19f5 succeeds

aborted the automatic merge because source branch was updated

added 1 commit

• acf3e9e3 - fpr -> train_fpr

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enabled an automatic merge when the pipeline for acf3e9e3 succeeds

merged

mentioned in commit 6dbf726b