Gravar-mail: Aliskiren Alone or in Combination With Hydrochlorothiazide in Hispanic/Latino Patients With Systolic Blood Pressure 160 mm Hg to <180 mm Hg (Aliskiren Alone or in Combination With Hydrochlorothiazide in Patients With Stage 2 Hypertension to Provide Quick Intensive Control of Blood Pressure [ACQUIRE] Substudy)