Add redirect to login page when token times out

[rhuss]

Currently only a 401 happens for an Ajax request and the UI doesn't change.

[kahboom]

Possibly relates to #182 .

[kahboom]

Speaking w/ the UXD team & @gashcrumb - we will probably need a design for a login page or some type of similar notification to the user to let them know that their session has timed out.

[astefanutti]

An option would be to pop an error notification toast with an appropriate message and a link to reload the page / to the login page. That may be more informative than a console log and less disruptive than an automated redirect.

[gashcrumb]

@astefanutti +1 this is exactly what the openshift console does and I think that works nicely.

[astefanutti]

@gashcrumb great! Let me do that, that'll be better than the current console log and we can still further improve it if needed.