Deleting hosts from the "All Hosts" listing leaves them as Content Hosts.
Cloned from https://bugzilla.redhat.com/show_bug.cgi?id=1187317
Description of problem:
Creating a new host and then deleting the hosts leaves their entry in the content host section and the user has to do an unregister to fully remove the entry.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Create a new host.
2. Validate it was provisioned and registered successfully
3.Click hosts > Content Hosts and validate the entry exists.
4. Go back to Hosts > All Hosts
5. Poweroff (if it is virtual) and delete the host.
6. Go back to Hosts > Content Hosts and validate the existance of the host.
Host is still listed in the content host listing even after deleting.
Either the host is automatically removed or the user is asked whether they would like to automatically remove the host fromt he Content Hosts/