Modify the cookie path and clear cookie when logout

The Jira ticket is:

https://arraynetworks.atlassian.net/browse/TWSD-517
It is reopened ticket.

I organized the code that all pages will call same function in our library.

The main function of the changes are:

1. Check cookie named 'no_warning' is exist or not. If it is not exist, then show warning and record the cookie. Otherwise, hide the warning.

2. The cookie path should be /. Originally, it will be URL for each page, such as /apv/monitoring/index/slb.

3. When we call logout API, clear the cookie named 'no_warning'.

4. Remove useless module in require
For the warning window and cookie,

you can see the attachment as reference.