Cloned from https://bugzilla.redhat.com/show_bug.cgi?id=1324461
Description of problem:

Depending on the size of reports for a host, the request for the reports
for a host via API/hammer consumes large amount of memory.

How reproducible:
the system needs to have reasonable history of puppet reports in order to reporduce the issue

Steps to Reproduce:
1. curl -k -u admin:changeme -H "Accept:application/json"\
https://foreman.example.com/api/v2/hosts/myhost.example.com/reports?per_page=120

Actual results:
The passenger process starts consuming a lot of memory and it takes tens of minuts to finish (if the server doesn't fail on insufficient amount of memory before it finishes).

Expected results:
The request returns reports for a host