Fixes #5628 - remove converted v1 API controllers and tests.

Remove all of the v1 controllers and tests that have already been converted to v2 and are no longer used.

http://projects.theforeman.org/issues/5628
https://bugzilla.redhat.com/show_bug.cgi?id=1112836
@jlsherrill, +1, seems reasonable to create a redmine to track it so that it becomes a more complete capability vs a random api that gets forgotten.