Description of problem:

While generating Host-Registered Content Hosts report template getting error "undefined method `nvra' for nil:NilClass"

Version-Release number of selected component (if applicable): Satellite 6.13.0

How reproducible: always

Steps to Reproduce:
1. Register hosts to satellite

2. Go to webUI > monitor > Report-templates > click generate in front of "Host-Registered Content Hosts" > select date/time and generate .

Actual results: Report not generated and giving error .

Expected results: Report should generate and show all registered hosts details

Additional info: