added iterator test for start after db
added iterator test for start after db

bigeasy/abstract-leveldown,bryce-gibson/SQLdown,shimonenator/couchbasedown,Level/abstract-leveldown,calvinmetcalf/SQLdown,bryce-gibson/SQLdown,ralphtheninja/abstract-leveldown,calvinmetcalf/SQLdown,snowyu/node-abstract-nosql,watson/abstract-leveldown,ralphtheninja/abstract-leveldown