Update test case to reflect new login design

After switching to the traditional login design, /login-window.html was
replaced by /login.html so update test case accordingly.

Signed-off-by: Aline Manera <alinefm@linux.vnet.ibm.com>
Remove former login design files

ui/js/src/kimchi.login_window.js and ui/pages/login-window.html.tmpl are not
being used anymore since Kimchi switched to the traditional login flow.
So remove them.

Signed-off-by: Aline Manera <alinefm@linux.vnet.ibm.com>
Remove special console rules from nginx configuration

@consoleauth was used to know the console URL to redirect user after
login.
As Kimchi is using the "next" URL paramter to do that, this rule can be
removed.

Signed-off-by: Aline Manera <alinefm@linux.vnet.ibm.com>
Let frontend redirect user after logging

The frontend should redirect user after logging so it can properly
store the user information returned by /login for authorization matters.

Signed-off-by: Aline Manera <alinefm@linux.vnet.ibm.com>