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
http://projects.theforeman.org/issues/6440

The issue is rather terse because I have never seen this functionality in action so I'm not sure what it is or what work it would entail to resurrect it.