Fixes #5059 - Returns error message when sorting by wrong column.
Fixes #8222 - Prevent duplicate docker tags for repos
Fixes #7883: Allow filtering content by a content view version and repository.
Merge pull request #4791 from daviddavis/temp/20141031135736

Fixes #8222 - Prevent duplicate docker tags for repos
Merge pull request #4795 from ehelms/fixes-7883

Fixes #7883: Allow filtering content by a content view version and repos...
Refs #7883: Adds repository filter to tabs on content view version details.

This adds the ability to filter the package, errata and package group list
for a content view version by repository.
Merge pull request #4796 from ehelms/refs-7883

Refs #7883: Adds repository filter to tabs on content view version detai...
Merge pull request #4669 from adamruzicka/sort-by-fix

Fixes #5059 - Returns error message when sorting by wrong column