Description of problem:

After a repository becomes orphaned by removing the subscription from the Satellite's manifest, any updates to an ACS fail.

How reproducible:

every time

Is this issue a regression from an earlier version:

Not to my knowledge

Steps to Reproduce:

1. Have a Satellite with repos enabled and synced with an ACS created

2. Remove a subscription that provides access to 1 or more repositories

3. Try to update the ACS

Actual behavior:

Alternate Content Source page displays:

"500 Katello::Resources::Candlepin::Product: 404 Not Found {} (GET /candlepin/owners/ORG/products/186/?include=name&include=attributes.name&include=attributes.value):

Hammer command shows:

# hammer alternate-content-source list
Katello::Resources::Candlepin::Product: 404 Not Found {} (GET /candlepin/owners/ORG/products/186/?include=name&include=attributes.name&include=attributes.value)

Expected behavior:
Orphaned repos and products should not prohibit the ability to update an ACS

Business Impact / Additional info: