Fixed the paging url path in paging controls

The paging url path should be constructed using the action_url that is passed by the controllers to the paging control.

https://bugzilla.redhat.com/show_bug.cgi?id=1171167
#1182
@mzazrivec No, I don't think so. I did a quick scan of all ```action_url``` across all controllers and did not find any instance where we use more than one ```/```