Case T-393/15: Judgment of the General Court of 14 September 2017 — Università del Salento v Commission (Arbitration clause — General Programme ‘Fundamental Rights and Justice’ — Specific programme ‘Criminal Justice’ — Recovery of sums paid by the Commission under a grant agreement — Set-off of amounts owed — Partial reclassification of the action — Application for a declaration that there is no contractual claim)