Description of problem:
Previously this was added into the 1.x tree via 
https://bugzilla.redhat.com/show_bug.cgi?id=805678

Generating a 'diff' between two repositories (say one that tracks updates live, and one that's production tested) to see any differences. See the bug listed above for the original patch and filing. 

Version-Release number of selected component (if applicable):


How reproducible:
Always. 

Steps to Reproduce:
1. Install pulp 2.x
2. try to diff repos. 
3. Recall previous bug and try to bribe devs with alcohol. 

Actual results:
Haven't found out what drinks are appropriate for the level of effort required. 

Expected results:
Slightly buzzed developers and happy users. 

Additional info: