Add tests for CarbonCacheHandler
Add tests for CarbonCacheHandler

graphite-project/carbon,johnseekins/carbon,obfuscurity/carbon,deniszh/carbon,mleinart/carbon,iain-buclaw-sociomantic/carbon,criteo-forks/carbon,iain-buclaw-sociomantic/carbon,krux/carbon,krux/carbon,johnseekins/carbon,mleinart/carbon,graphite-project/carbon,pu239ppy/carbon,deniszh/carbon,pu239ppy/carbon,piotr1212/carbon,criteo-forks/carbon,piotr1212/carbon,obfuscurity/carbon