Case C-515/13: Judgment of the Court (Seventh Chamber) of 26 February 2015 (request for a preliminary ruling from the Østre Landsret — Denmark) — Ingeniørforeningen i Danmark, acting on behalf of Poul Landin v Tekniq, acting on behalf of ENCO A/S — VVS (Reference for a preliminary ruling — Social policy — Directive 2000/78/EC — Equal treatment in employment and occupation — Article 2(1) and (2)(a) — Article 6(1) — Difference of treatment on grounds of age — National legislation providing for severance allowance to be paid to workers entitled on the date of termination of the employment relationship to a State retirement pension)