Description of problem:
Loading preupgrade report on job detail doesn't work

Version-Release number of selected component (if applicable):
6.13

How reproducible:
Always

Steps to Reproduce:
1. Run Leapp preupgrade job
2. Wait until job is finished and report is loaded
3. Go to Monitor > Jobs > view detail of the job

Actual results:
Report is not loaded

Expected results:
Leapp preupgrade report is loaded