Update rethinkdb's run() to new syntax.

lib/util/rutil.js

@@ -21,10 +21,6 @@ module.exports.close = function(conn, options) {
 
 module.exports.run = function(conn, q, options) {
   var resolver = Promise.defer()
-  if (!options) {
-    options = {}
-  }
-  options.connection = conn
-  q.run(options, resolver.callback)
+  q.run(conn, options || {}, resolver.callback)
   return resolver.promise
 }