Case T-216/12: Judgment of the General Court of 6 October 2015 — Technion and Technion Research v Commission (Funding — Sixth framework programme for research, technological development and demonstration activities — Recovery of sums paid by the Commission in connection with a research contract in line with the conclusions of a financial audit — Set-off of claims — Reclassification in part of the action — Application for a declaration that a contractual claim does not exist — Arbitration clause — Eligible costs — Unjust enrichment — Obligation to state reasons)