Added docs for jsroutes task

Now it appers in rake -T
790064 Manifest import error handling

When a manifest import error occures on product repositories creation
we store this infromation and enable a user to recreate repositories
later. This is handy when a CDN server is not reacheable at the moment
of importing.

A new link is added to RedHat Repositories page which allows you to run
repository refresh action on demand. It also displays status based on
information stored at products of Red Hat. Status is updated only when
Katello runs import or repository refresh action.

When CDN content changes Katello has no information about it and status
still indicates OK state. However a cron which runs refresh periodically
solves this case.