Cloned from https://bugzilla.redhat.com/show_bug.cgi?id=1649766

Description of problem:
When trying to preview a report, user input is handled incorrectly. Its value is probably not passed or plainly wrong. In default templates, this leads to empty dataset. When I remove the search from the default template, preview shows full dataset. When generating report normally, user input works.

Version-Release number of selected component (if applicable):
Reproduced on Sat 6.5 snap 3

How reproducible:
Deterministic

Steps to Reproduce:
1. Monitoring -> Report Templates -> <some_default_template> -> Preview

Actual results:
Empty dataset

Expected results:
Dataset for the selected host