tail subcommand doesn't give any warning of a typo

[thepeterstone]

If I had the app logspinner, but did the command for cf log-cache tail logzpinner, it would succeed. It looks like it assumes that I am looking for a bosh component and therefore doesn't complain.

However, we could look at meta, and give a warning that the given source-id doesn't exist in log-cache.

[cf-gitbot]

We have created an issue in Pivotal Tracker to manage this:

https://www.pivotaltracker.com/story/show/155537283

The labels on this github issue will be updated when the story is started.