Description of problem: a field named href slug is listed as an available field during report creation. I assume this is some internal reference that should not be exposed


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


How reproducible: easily reproduced


Steps to Reproduce:
1. add a new report
2. base report on availability zones
3. scroll in the resultant list of available fields to "href slug"

Actual results:


Expected results:


Additional info: this field seems to be invalid and is empty. It's available many "base report on" options but not all