[ZEPPELIN-3129] Zepplin UI Doesnt logs out in IE

[prabhjyotsingh]

What is this PR for?

Zepplin UI Doesn't logs out in IE/Edge, its Shows Logout Success and automatically reload the page
But the User is still logged in.

This happens when shiro is configured with "authc" however it works for "authcBasic".

What type of PR is it?

[Bug Fix]

What is the Jira issue?

• ZEPPELIN-3129

How should this be tested?

• Logout should work for all browsers and for both shiro configuration i.e. "authc" and "authcBasic"

Questions:

• Does the licenses files need update? N/A
• Is there breaking changes for older versions? N/A
• Does this needs documentation? N/A

[prabhjyotsingh]

Have tested this on FF31, FF57, Chrome-63, Safari-11, Windows7's IE-12 and Windows10's Edge-25

[Akhilsnaik]

Have Tested in Windows 7 IE 11 ,
The Fix works fine in IE 11.

[prabhjyotsingh]

Thanks for the review will merge this if no more discussion.