Updated openstack/openstack
Project: openstack/nova  fa22659f18495741a5edfc716be9ce7fdbda653e

console: introduce a new exception InvalidToken

Introduces a new exception InvalidToken used when an effectively
invalid token has be sent to a console proxy.
Updates the code to take advantage of this new one.

Change-Id: I9eb18541847e0ce22d5a449268876043ed8eb3a1