Fixes #5860 - correctly error on validation failure

fixes #5860 - added test

fixes #5860 - really added test
Fixes #5163/BZ848564 - ensure limited host groups have >= 1 hosts.
fixes #6038 - removing content host event page
Fixes #6021 - Remove route mapping to UsersController

GET /users/:login/owners was being mapped twice.

Remove route to UsersController and allow it to route
to the CandlepinProxiesController.
Merge pull request #4200 from mstead/Fixes-6021

Fixes #6021 - Remove route mapping to UsersController
Fixes 6048: The spec file was not building due to the new katello-debug changes
Merge pull request #4209 from bkearney/bkearney/6048

Fixes 6048: The spec file was not building due to the new katello-debug ...
Merge pull request #4204 from jlsherrill/events

fixes #6038 - removing content host event page
Merge pull request #4133 from thomasmckay/5860-actkey-validate

Fixes #5860 - correctly error on validation failure
Fixes #5992 and #5993 - qpid-cpp-server-store needs to be added to the repo
Merge pull request #4203 from waldenraines/5163

Fixes #5163/BZ848564 - ensure limited host groups have >= 1 hosts.
Merge pull request #4215 from jmontleon/add-qpid-cpp-store

Fixes #5992 and #5993 - qpid-cpp-server-store needs to be added to repo
Fixes #5911 - perms for system registration calls

Also handles env lockin/cv lockin for content view remove

Rules of the Game
To register a system one needs
1) create_content_hosts (under content hosts resource)
2) view_content_views
3) view_environments

Also cleaned out some old code.