Master should disallow frameworks that reconnect after failover timeout.

When a scheduler reconnects after the failover timeout has exceeded, the framework id is usually reused because the scheduler doesn't know that the timeout exceeded and it is actually handled as a new framework.

The /framework/:framework_id route of the Web UI doesn't handle those cases very well because its key is reused. It only shows the terminated one.

Would it make sense to ignore the provided framework id when a scheduler reconnects to a terminated framework and generate a new id to make sure it's unique?