Adding contrail-webui-userauth.js in /etc/contrail directory which is aliased to
$core_src/config/userAuth.js
This file contains admin user_name/password details

Change-Id: Id08493e66005c1a71d57ea73d5a405d9ee58c1f2
(cherry picked from commit 22f2f42ff5cb0e613b9d36796e22388062eef6a4)
Merge "Adding contrail-webui-userauth.js in /etc/contrail directory which is aliased to $core_src/config/userAuth.js This file contains admin user_name/password details" into R2.0