Fixes #8101 - Show docker pull url for repository details page
Merge pull request #4819 from adamruzicka/docker-pull-url

Fixes #8101 - Show docker pull url for repository details page
Fixes #7688: add a content hosts tab to the errata details page.

Adds a content host tab to the errata details page that allows
the listing and syncing of applicable content hosts.

http://projects.theforeman.org/issues/7688