Description of problem:  Removing CV error's with "Cannot delete record because of dependent content_facet"

How reproducible: 


Steps to Reproduce:
1. Move all Hosts from CV to another
2. Delete CV
3.

Actual results:
Will not allow deleting the CV with the error "Cannot delete record because of dependent content_facet"


Expected results:
Delete the CV 


Additional info:
Workaround was as below:

# foreman-rake console
> pp ::Katello::ContentView.find_by(name: 'GEL-PROD-8_2-DevSuite').content_facets.first
---

Note. The name of your CV is "GEL-PROD-8_2-DevSuite" and it should be empty. However, we can see an entry over there
---
#<Katello::Host::ContentFacet:0x00005640b91e8778
 id: 464,
 host_id: 498,
 uuid: "aaed8122-84da-4b1f-afa2-1a03944079a2",
 content_view_id: 4,
 lifecycle_environment_id: 1,
 kickstart_repository_id: nil,
 content_source_id: nil,
 installable_security_errata_count: 0,
 installable_enhancement_errata_count: 0,
 installable_bugfix_errata_count: 0,
 applicable_rpm_count: 0,
 upgradable_rpm_count: 0,
 applicable_module_stream_count: 0,
 upgradable_module_stream_count: 0,
 applicable_deb_count: 0,
 upgradable_deb_count: 0>
---


We can see that the host_id is 498 and id is 464, another way to confirm that this is not anymore in your environment, it's trying to access the link below

	https://your_satellite_fqdn_here/content_hosts/498
	
	Note. This will return "Danger alert:Resource host not found by id '498'"


In order to fix, yet on "foreman-rake console"
---
> ::Katello::Host::ContentFacet.find(464)
> ::Katello::Host::ContentFacet.find(464).destroy!
> ::Katello::Host::ContentFacet.find(464)
---

Once we got more than one object lost in your content facet, we created a rake that will do the cleanup for you. Just follow as below

1. Create the file cleanup.rake with the content below
---
::Katello::ContentView.find_by(name: 'GEL-PROD-8_2-DevSuite').content_facets.each do |h|
   puts "#{h.id}"
  ::Katello::Host::ContentFacet.find(h.id).destroy
end
---

2. Call the foreman-rake passing the file
---
# foreman-rake console < cleanup.rake