fix: reject with general error in Redis#connect (#354)

Author: Gerhut

lib/redis.js

@@ -299,9 +299,9 @@ Redis.prototype.connect = function (callback) {
         _this.removeListener('close', connectionCloseHandler);
         resolve();
       };
-      var connectionCloseHandler = function (err) {
+      var connectionCloseHandler = function () {
         _this.removeListener(CONNECT_EVENT, connectionConnectHandler);
-        reject(err);
+        reject(new Error(utils.CONNECTION_CLISED_ERROR_MSG));
       };
       _this.once(CONNECT_EVENT, connectionConnectHandler);
       _this.once('close', connectionCloseHandler);