Fixes #7047/BZ1128467: get full result of product's repositories.

We were only getting the (default) first 20 results for a product's
repositories.  This commit ensures we fetch all of a product's
repositories for display.

http://projects.theforeman.org/issues/7047
https://bugzilla.redhat.com/show_bug.cgi?id=1128467
Merge pull request #4568 from waldenraines/7047

Fixes #7047/BZ1128467: get full result of product's repositories.