By Kate Abnett BRUSSELS (Reuters) – Leaders of European Union countries will debate whether and how to cap gas prices on Friday, after member states increased the pressure on Brussels to limit fuel costs. European Commission President Ursula von der Leyen on Wednesday suggested gas price cap options for the EU leaders to discuss, after France, Italy, Poland and 12 other countries urged Brussels to propose an EU-wide gas price cap as a way to contain inflation. Other countries are opposed – among them Germany, Europe’s biggest gas buyer, and the Netherlands – which say capping prices could unde…