zeppelin git commit: [ZEPPELIN-2026] Flaky Test: WebDriverManager.getWebDriver() fails with Unable to locate element 'WebSocket Connected'

[moon]

Repository: zeppelin
Updated Branches:
  refs/heads/master 7e045728e -> 7ccfdf705


[ZEPPELIN-2026] Flaky Test: WebDriverManager.getWebDriver() fails with Unable 
to locate element 'WebSocket Connected'

### What is this PR for?
Selenium test sometimes fails with

```
Caused by: org.openqa.selenium.NoSuchElementException: Unable to locate 
element: {"method":"xpath","selector":"//i[tooltip='WebSocket Connected']"}
```

This PR gives enough timeout (30s) for waiting 'WebSocket Connected' element.

Tested in my travis account 5 times and they're all green.
https://travis-ci.org/Leemoonsoo/zeppelin/builds/196428795
https://travis-ci.org/Leemoonsoo/zeppelin/builds/196429337
https://travis-ci.org/Leemoonsoo/zeppelin/builds/196429559
https://travis-ci.org/Leemoonsoo/zeppelin/builds/196429593
https://travis-ci.org/Leemoonsoo/zeppelin/builds/196430020

However, I'm not 100% sure if it really fixes the flaky test.
So, I'd like to merge this PR but keep ZEPPELIN-2026 open for next 1 week.
And then see if no selenium test fails with the error for next 1 week to close 
ZEPPELIN-2026.

### What type of PR is it?
Improvement

### Todos
* [x] - Increase timeout of detecting 'connected'

### What is the Jira issue?
https://issues.apache.org/jira/browse/ZEPPELIN-2026

### How should this be tested?
CI green on Selenium test profile

### Questions:
* Does the licenses files need update? no
* Is there breaking changes for older versions? no
* Does this needs documentation? no

Author: Lee moon soo <m...@apache.org>

Closes #1959 from Leemoonsoo/ZEPPELIN-2026 and squashes the following commits:

87432d5 [Lee moon soo] increase timeout


Project: http://git-wip-us.apache.org/repos/asf/zeppelin/repo
Commit: http://git-wip-us.apache.org/repos/asf/zeppelin/commit/7ccfdf70
Tree: http://git-wip-us.apache.org/repos/asf/zeppelin/tree/7ccfdf70
Diff: http://git-wip-us.apache.org/repos/asf/zeppelin/diff/7ccfdf70

Branch: refs/heads/master
Commit: 7ccfdf705d3fd79590ec5d9fb7ba0b48e285ed84
Parents: 7e04572
Author: Lee moon soo <m...@apache.org>
Authored: Mon Jan 30 06:56:28 2017 +0900
Committer: Lee moon soo <m...@apache.org>
Committed: Wed Feb 1 00:46:43 2017 +0900

----------------------------------------------------------------------
 .../src/test/java/org/apache/zeppelin/WebDriverManager.java        | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
----------------------------------------------------------------------


http://git-wip-us.apache.org/repos/asf/zeppelin/blob/7ccfdf70/zeppelin-server/src/test/java/org/apache/zeppelin/WebDriverManager.java
----------------------------------------------------------------------
diff --git 
a/zeppelin-server/src/test/java/org/apache/zeppelin/WebDriverManager.java 
b/zeppelin-server/src/test/java/org/apache/zeppelin/WebDriverManager.java
index 41bd1b0..e8cc4cc 100644
--- a/zeppelin-server/src/test/java/org/apache/zeppelin/WebDriverManager.java
+++ b/zeppelin-server/src/test/java/org/apache/zeppelin/WebDriverManager.java
@@ -122,7 +122,7 @@ public class WebDriverManager {
     while (System.currentTimeMillis() - start < 60 * 1000) {
       // wait for page load
       try {
-        (new WebDriverWait(driver, 5)).until(new ExpectedCondition<Boolean>() {
+        (new WebDriverWait(driver, 30)).until(new ExpectedCondition<Boolean>() 
{
           @Override
           public Boolean apply(WebDriver d) {
             return d.findElement(By.xpath("//i[@tooltip='WebSocket 
Connected']"))