Judgment of the Court of 31 October 2017 in Case E-16/16 — Fosen-Linjen AS v AtB AS (Public procurement — Directive 89/665/EEC — Directive 2004/18/EC — Claim for compensation — Culpability — Gravity of the breach — Burden of proof — Verification of the tender submitted — Principles of effectiveness, equal treatment, transparency and proportionality)