test(connection): increase delay to make sure driver give up reconnection

Re: #4027

Author: Fonger

test/connection.test.js

@@ -217,7 +217,7 @@ describe('connections:', function() {
           }).
           then(function() {
             return new Promise(function(resolve) {
-              setTimeout(function() { resolve(); }, 400);
+              setTimeout(function() { resolve(); }, 4000);
             });
           }).
           then(function() {