Case F-63/11: Judgment of the Civil Service Tribunal (Third Chamber) of 13 June 2012 — Macchia v Commission (Civil service — Members of the temporary staff — Non-renewal of a fixed-term contract — Administration’s discretion — Duty to have regard to the welfare of officials — Article 8 of the Conditions of Employment of other Servants of the European Communities — Article 4 of the decision of the Director General of OLAF, of 30 June 2005 , on the engagement and employment of OLAF’s temporary staff — Maximum duration of contracts of a temporary agent)