MADRID (Reuters) -Spain’s Energy Minister Teresa Ribera said on Thursday she is confident Algerian state-owned gas company Sonatrach will respect its commercial contracts to supply natural gas to Spanish utilities despite a diplomatic spat. “We won’t think (the contracts) could be broken in a unilateral manner by a decision from the Algerian government,” Ribera said in an interview with Spanish radio station Onda Cero. Algeria suspended a 20-year-old friendship treaty with Spain on Wednesday and banned imports from Spain in a row over Madrid’s stance on Western Sahara. Ribera acknowledged the …