Double Object Tender Procedure For The Identification Of The Majority Private Shareholder Of The Mixed Public-Private Company Se.Ra Servizi Ristorazione Associati Srl And For The Assignment Of The Management Of School And Collective Catering Services With Social Value Under The Competence Of The Reno Galliera Union For The Municipalities Belongings To The Lands Of Planura Union For The Municipality Of Malalbergo