Non Inferiority of Fixed Combination of Beclomethasone Dipropionate (BDP) + Formoterol Fumarate (FF) + Glycopyrronium Bromide (GB) Versus Combination of Fluticasone Furoate (FlF)/Vilanterol (VI) + Tiotropium Bromide in Chronic Obstructive Pulmonary Disease (COPD)