For many people, choosing a restaurant comes down to a couple of factors. What type of food do you want, and do they serve Coke or Pepsi? My wife and I are long-time Coca-Cola drinkers, so the beverage served is often a key. Restaurants usually sign long-term deals with one of the two beverage brands. So it was big news when three fast-food chains announced they were changing beverage providers this week. Two that are making changes are regional chains, while the third is one of the biggest brands in the world…