Removes console output plugin from the core list

As per the discussion at the Nova mid cycle meetup
the console_output plugin is removed from the core plugin list.
console_output is not supported well by the hypervisors and has
known security issues. Note that there are no changes to API samples
as even though the extension name has changed the api samples were
mislabelled anyway.

Partially implements bp v3-api-core

Change-Id: I56a55f245fff8217452acb0a754ac98a342fca88
Merge "Removes console output plugin from the core list"