Cloned from https://bugzilla.redhat.com/show_bug.cgi?id=1714357

Description of problem:
It is now not possible to search host by value of certain parameter

Version-Release number of selected component (if applicable):
satellite-6.6.0-5.beta.el7sat.noarch (snap 4)

How reproducible:
always

Steps to Reproduce:
1. Have a host with parameter:
Name: wrhSWlGmTG
Type: string
Value: yNQdKtCqYD
2. Attempt to search for that host on Hosts -> All Hosts with query
"params.wrhSWlGmTG = yNQdKtCqYD"

Actual results:
Error shown:
Field 'params.wrhSWlGmTG' not recognized for searching!

Expected results:
Search should work

Additional info:
Also mentioned here: https://community.theforeman.org/t/api-search-host-parameter-value/14032

Marking as a regression as according to tests this worked before.