Fixes #5514 Subscription Link missing in Content Host Subscriptions
fixes #5611 - associating content with Library in candlepin

this allows systems to recieve content from Library
Merge pull request #4056 from jlsherrill/content_enable

fixes #5611 - associating content with Library in candlepin
Merge pull request #4038 from dustint-rh/bz995940_redmine5514_subs_link_in_content_hosts_subs

Fixes #5514 Subscription Link missing in Content Host Subscriptions